Vancouver (also called ICMJE or author–number) is the preferred referencing style across medicine, nursing, dentistry, and much of the biomedical and health sciences. It’s compact, numeric, and designed for fast reading in clinical and research contexts. This guide distills the essentials you need for 2026, including how to cite in the text, how to build the reference list, and dozens of copy-and-paste examples for the sources you’ll most likely use.
What is Vancouver style?
Vancouver is a numeric system: you cite a source with a number as it appears in your text, and list full details in a numbered reference list in the same order. The scheme originated from medical journals adopting common standards and today aligns with the International Committee of Medical Journal Editors (ICMJE) Recommendations and formatting conventions adapted by the U.S. National Library of Medicine (NLM). In practice, that means: numbered citations in the text; a numbered, order-of-appearance reference list; and journal titles abbreviated using NLM’s standard abbreviations.
Vancouver Style in Brief: Key Rules for In-Text and References
- In-text: Use a number the first time you cite a source → that number sticks to that source everywhere thereafter. Numbers can be superscript (like this¹) or in parentheses/brackets (like this (1) or [1]) — pick one format and stay consistent. For consecutive sources, use a range (e.g., 2–5). For non-consecutive, use commas (e.g., 2,4,9).
- Reference list: Numbered 1, 2, 3… in the order cited, not alphabetical. Minimal punctuation, author initials without periods, and journal titles in NLM abbreviations. Include DOI where available.
- Core authorities: Always check your target journal’s “Instructions for Authors,” but the ICMJE Recommendations and NLM’s guidance remain the baseline style references used by countless libraries and journals.
Part 1 — In-text citations (how to cite inside your paragraph)
Assign numbers by first appearance. The first source you cite becomes 1, the next is 2, and so on. If you mention source 1 again later, it stays 1. You can place numbers after the relevant phrase, after the author’s name, or at the sentence end. Just be consistent with placement and format across your document.
Formatting options (choose one and stick to it):
- Superscript: Several RCTs report improved outcomes¹
- Parentheses: Several RCTs report improved outcomes (1)
- Brackets: Several RCTs report improved outcomes [1]
Most institutional guides accept any of these as long as you’re consistent; check your course or journal rules if they specify one.
Multiple citations at once:
- Non-consecutive: 1,3,7
-
Consecutive range: 2–5
Many publisher sheets (e.g., T&F’s Vancouver sheet) illustrate the comma-and-range pattern; again, follow your journal’s preference if it specifies commas vs. dashes.
Citing tables & figures: Number your references as usual where you first discuss the table or figure, or place the callout within the caption. Either way, the numbering continues the same sequence. Most institutional Vancouver guides allow both placements; the key is consistency.
Part 2 — The reference list (how to format each entry)
Vancouver references are compact. They prefer initials without periods, minimal punctuation, and a fixed element order. Journal articles omit “Volume/Issue” labels (you list the numbers only); books include publisher and place. Journal titles are abbreviated using the NLM Catalog abbreviation.
General rules you’ll use constantly
- Order: number entries by the order cited in your text (1, 2, 3…), not alphabetically.
- Authors: Surname followed by initials (no periods between initials). Up to 6 authors list them all; more than 6 → list the first 6 followed by “et al.” (many institutional Vancouver guides follow this common rule; check your specific journal in case they want all authors).
- Titles: Capitalization is usually sentence-style for article titles; do not italicize article titles. Journal titles are abbreviated per NLM standards (see below).
- Journal abbreviations: Look them up using the NLM Catalog “Journals” subset. Do not invent your own abbreviations.
- DOIs: Include a DOI when available (format as doi:10.xxxx/xxxxx). Many Vancouver guides and journals now strongly encourage (or require) DOIs for electronic articles.
- Online sources: Provide the URL and accessed date if content is likely to change such as webpages, guidelines, or datasets. Some journals prefer DOIs over URLs if both exist, so follow the journal rule.
- Spacing & punctuation: Vancouver favors brevity. Commas and semicolons separate fields; there are no “Vol.” or “No.” labels for journals, and pages are usually shortened (e.g., 123–9).
Finding the correct journal abbreviation
Use either of the following authoritative routes:
- NLM Catalog – Journals referenced in NCBI databases search a title to retrieve its official abbreviation).
- Abbreviation rules in Citing Medicine (NLM’s style guide) explain how abbreviations are constructed and when not to abbreviate.
Part 3 — Templates & examples (copy-ready)
Below are Vancouver-style patterns you can adapt. Replace the placeholder fields with your details and check the journal abbreviation.
Tip: Where a DOI exists, include it. Where a source is entirely online and mutable (e.g., a web guideline), include the access date.
1) Journal article (with DOI)
Template
#. Author AA, Author BB, Author CC, et al. Article title in sentence case. Abbrev J Title. YYYY;VV(II):PP–PP. doi:DOI
Example
1. Nguyen T, Lopez R, Chen M, et al. Early mobilization after hip fracture: a randomized trial. J Orthop Trauma. 2025;39(4):215–22. doi:10.1097/BOT.0000000000009999
Elements/order and omission of “Vol./No.” labels follow NLM/Vancouver conventions.
2) Journal article (online-first or e-pub)
If the article has a DOI but lacks final pagination, include the DOI and year; journals vary on whether to add “Epub YYYY Mon DD.” Follow your target journal’s instructions; many now just require the DOI.
Example
2. Diaz S, Patel K. AI triage for dermatology: performance in primary care. Br J Gen Pract. 2026;. doi:10.3399/bjgp.2026.0123
3) Systematic review or meta-analysis (same as standard article)
Example
3. Ahmed Z, Zhao L. Vitamin D supplementation and falls: a meta-analysis. Osteoporos Int. 2024;35(11):2313–25. doi:10.1007/s00198-024-06789-3
4) Preprint
Preprints are increasingly cited. Give the platform, year, article number or identifier, and DOI if assigned.
Template
#. Author AA, Author BB. Title. Platform [Preprint]. YYYY [cited YYYY Mon DD]. Available from: URL
Example
4. Rivera P, Kahn J. Rapid antigen test performance in schools.
medRxiv [Preprint]. 2025 [cited 2026 Jan 5]. Available from:
https://medrxiv.org/…
(Your journal may prefer a DOI if the preprint has one.)
5) Book (print)
Template
#. Author AA, Author BB. Title of book. Edition. Place: Publisher; YYYY.
Example
5. Patel R, Kumar S. Critical care handbook. 3rd ed. London: Helix Press; 2024.
Books include place and publisher (unlike journal articles).
6) Book chapter
Template
#. Chapter Author AA. Chapter title. In: Editor AA, Editor BB, editors. Book title. Edition. Place: Publisher; YYYY. p. PP–PP.
Example
6. Liao M. Intubation in difficult airways. In: Reed T, Walker N, editors. Emergencies in anesthesia. 2nd ed. Oxford: Fontwell; 2023. p. 77–93.
7) Webpage or online guideline
Include the organization/author, title, site, year (or “no date” if none), URL, and accessed date.
Template
#. Organization/Author. Title of page. Site/Publisher; YYYY [cited YYYY Mon DD]. Available from: URL
Example
7. World Health Organization. Guidance on mpox vaccination. WHO; 2025 [cited 2026 Jan 5]. Available from: https://www.who.int/…
Vancouver (via NLM and institutional guides) expects access dates for content likely to change.
8) Dataset
Template
#. Creator AA, Creator BB. Dataset title [dataset]. Repository; YYYY [cited YYYY Mon DD]. Available from: URL. doi:DOI
Example
8. Chen Y, Mistry V. Global neonatal sepsis rates [dataset]. figshare; 2024 [cited 2026 Jan 5]. Available from: https://doi.org/10.6084/m9.figshare.XXXX
9) Conference paper/abstract
Template
#. Author AA, Author BB. Title of contribution. In: Title of conference abstracts; YYYY Mon DD–DD; City, Country. Publisher; YYYY. p. PP–PP.
Example
9. Al-Hassan T, Cooper J. Point-of-care ultrasound for DVT in the ED. In: 20th World Emerg Med Congress abstracts; 2025 Oct 3–6; Dubai, UAE. WEM; 2025. p. 142–3.
10) Thesis/dissertation
Template
#. Author AA. Title [type of thesis]. City: University; YYYY.
Example
10. Ibrahim N. Machine learning for chest CT triage [PhD thesis]. Islamabad: Quaid-i-Azam University; 2025.
11) Newspaper or magazine article (online)
Template
#. Author AA. Title of article. Newspaper/Magazine. YYYY Mon DD [cited YYYY Mon DD]. Available from: URL
Example
11. O’Malley C. Hospitals test AI scribes. Stat News. 2025 Nov 14 [cited 2026 Jan 5]. Available from: https://www.statnews.com/…
12) Government/NGO report
Template
#. Organization. Title: subtitle. Place: Publisher; YYYY.
Example
12. National Institute for Health and Care Excellence. Asthma: diagnosis, monitoring and chronic asthma management. London: NICE; 2024.
13) Personal communication
Cite personal communications in text only (e.g., “(Dr Khan, email, 2026 Jan 3)”) unless your journal explicitly allows them in the reference list; they’re not recoverable and typically excluded from the list. Check the target journal’s rules, which often trace back to ICMJE guidance about accessible sources.
Common Vancouver Referencing Details That Often Cause Confusion
Even seasoned writers can stumble over the finer points of the Vancouver style. The following sections highlight the most common areas of confusion and how to handle them correctly.
1) How many authors do I list?
A common convention in Vancouver guides is “list up to six authors; beyond six, list the first six followed by et al.” Some journals differ (e.g., list up to three, then et al.). Follow your Instructions for Authors first; when none are provided, the “up to six + et al.” pattern is widely used in university Vancouver guides.
2) Capitalization & initials
Use surname then initials with no punctuation between initials (e.g., Smith JA, Patel R). Article titles typically use sentence case; journal names use NLM abbreviations (e.g., N Engl J Med).
3) Journal abbreviations (NLM)
This is the single biggest Vancouver-specific habit to build. Search the NLM Catalog for the official abbreviation and copy it exactly (no guessing). Some titles are not abbreviated (e.g., single-word titles).
4) Page ranges
Vancouver often compresses page ranges (e.g., 123–9, 1045–52). Many journals accept full ranges too (123–129). Use the journal’s preferred convention if stated; otherwise, either is usually fine. Be consistent within your list.
5) DOIs vs URLs
If a DOI exists, include it. For content that changes such as webpages or living guidelines, include the URL and access date. Some journals prefer the DOI instead of the URL for articles, so follow the journal’s policy.
6) Epub ahead of print & article IDs
Modern journals increasingly publish with article identifiers instead of page numbers. If there’s no volume/issue/page yet but a DOI exists, cite the DOI and year; once the article is paginated, update the reference if you’re resubmitting. (Publisher and university Vancouver guides reflect this practice.)
Efficient Reference Management for Vancouver Style Using Zotero, EndNote, and Mendeley
You’ll save hours if you set up your reference manager to output Vancouver (NLM/ICMJE) correctly:
- Install the Vancouver/ICMJE style packaged with your tool (e.g., “Vancouver (superscript)” or “Vancouver (NLM)” in Zotero/EndNote).
- Journal abbreviations: load or enable the NLM journal terms list so your manager outputs JAMA, N Engl J Med, etc., correctly. Many library guides show how to add the NLM Journals Term List.
- Check the output against your journal’s “Instructions for Authors”; tweak if the journal uses a local variant (e.g., bracketed vs superscript in-text numbers).
In these cases, support may do more harm than good.
Common mistakes (and how to fix them fast)
Even with careful attention to detail, it’s easy to make small errors when applying the Vancouver style. Here are some of the most frequent mistakes and quick ways to correct them.
- Alphabetizing the list: Vancouver is numeric, order-of-appearance, not A–Z. Fix by sorting by citation order (your reference manager can repaginate automatically).
- Using full journal titles: Use NLM abbreviations (e.g., BMJ not British Medical Journal). Find them in the NLM Catalog.
- Mixing in-text formats: Don’t switch between superscript and [brackets]. Choose one.
- Missing DOIs: If a DOI exists, include it; it future-proofs your reference.
- Forgetting access dates on changing web content. Add [cited YYYY Mon DD].
Extended examples by source type
Use these as starting points. Swap in your details and check abbreviations.
Journal article (many authors)
13. Raza K, Ahmed S, Lee J, Chen X, Müller T, Yamada H, et al. Wearable ECG for atrial fibrillation detection in primary care: a pragmatic trial. Eur Heart J. 2025;46(2):201–10. doi:10.1093/eurheartj/ehad123
Journal article (no issue number)
14. Sweeney M, Ortiz A. Reducing alarm fatigue in ICUs: a multi-center study. Crit Care Med. 2024;52:1183–91. doi:10.1097/CCM.0000000000009999
Journal article with article ID (no pages)
15. Lopes R, Tanaka H. Real-time ventilation analytics in the OR. Anesth Analg. 2026;.;e12345. doi:10.1213/ANE.000000000000e12345
Online guideline (organization as author)
16. National Comprehensive Cancer Network. NCCN Clinical Practice Guidelines in Oncology: Breast Cancer. NCCN; 2025 [cited 2026 Jan 5]. Available from: https://www.nccn.org/…
Book with many editors (compiled volume)
17. Brown G, Malik S, Kim R, editors. Point-of-care ultrasound in internal medicine. New York: MedSci; 2023.
Chapter in edited e-book
18. Torres J. Shock resuscitation. In: Brown G, Malik S, Kim R, editors. Point-of-care ultrasound in internal medicine. New York: MedSci; 2023. p. 245–62.
Government report (online)
19. Centers for Disease Control and Prevention. Antibiotic resistance threats in the United States. Atlanta (GA): CDC; 2024 [cited 2026 Jan 5]. Available from: https://www.cdc.gov/…
Thesis (online repository)
20. McCarthy P. Predicting sepsis from triage vitals [master’s thesis]. Dublin: Trinity College Dublin; 2025 [cited 2026 Jan 5]. Available from: https://…
Conference abstract in journal supplement
21. Zhang F, Ito K. Bedside echo training outcomes for interns. Acad Med. 2025;100(Suppl):S89.
Dataset (with DOI only)
22. Kim S, Dlamini P. Echocardiography segmentation masks [dataset]. 2025 [cited 2026 Jan 5]. doi:10.5281/zenodo.1234567
Software / code
If code is archived with a DOI (e.g., Zenodo/GitHub), treat like a dataset or software:
23. Adeel S. CardioNet risk-score calculator [software]. Zenodo; 2026 [cited 2026 Jan 5]. doi:10.5281/zenodo.7654321
Vancouver vs. AMA vs. journal-specific tweaks
Vancouver and AMA are close cousins (both numeric), but journals often make small local choices: superscripts vs brackets, punctuation spacing, whether to truncate author lists at 6 or more, and so on. Your safest move: format to Vancouver generally, then adjust to the journal’s Instructions for Authors. Most medical libraries explicitly note that Vancouver is based on ICMJE/NLM and then adapted locally by journals.
Where to check the “official” rules quickly
To ensure your references meet professional and journal-specific standards, it’s best to consult the primary style authorities. The following sources provide the most reliable and up-to-date guidance on Vancouver referencing.
- ICMJE Recommendations (current edition) the top-level policy document used by medical journals; download the latest PDF and search “References.”
- NLM “Citing Medicine” & Samples of Formatted References the detailed style backbone used by many Vancouver guides (how to order elements, omit labels for volume/issue, etc.).
- University Vancouver guides for fast, example-driven help that reflects the above authorities (often updated through 2025–2026).
A 12-point Vancouver checklist (2026)
- Pick your in-text number style (superscript or [brackets]) and keep it consistent.
- Number by first appearance; reuse the same number for that source forever.
- Group citations as 2–5 (range) or 2,4,9 (individual).
- The reference list is numeric, not alphabetical.
- Authors: Surname + initials; truncate with et al. beyond the journal’s limit (often >6).
- Article titles: sentence case; no italics.
- Journal titles: use NLM abbreviations from the NLM Catalog.
- Journals: year; volume(issue):pages (no “Vol.”/“No.” labels).
- Include DOIs where available, especially for online-first.
- Web/guidelines: add URL and [cited date].
- Books/chapters: include place and publisher (unlike journal articles).
- Double-check journal-specific tweaks in the Instructions for Authors.
Strong academic writing combines accurate citations with engaging content. For tips on crafting powerful openings, read How to Write a Hook for a Research Paper.
FAQ (2026)
For deeper insights and real-world examples, explore our guide on How to Find Case Studies for Research: Best Resources & Tips.
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Vancouver’s power is its clarity and consistency: numbers for speed in the text; compact, standardized records in the reference list. If you remember only two things for 2026, make them these: (1) number by first appearance and keep the number with the source; (2) use NLM journal abbreviations and include DOIs where possible. With those habits (and the templates above) you’ll be comfortably within spec for most health-science journals that follow ICMJE/NLM conventions.
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