Vancouver Citation Style: Medical & Science Guide

What Is Vancouver Style?

Vancouver style is a numbered citation system used primarily in medicine, nursing, pharmacy, dentistry, and the life sciences. Rather than placing author names and dates in the text, you assign each source a number the first time you cite it, and use that number — typically as a superscript — every time you cite the source thereafter. The complete reference list at the end of the paper is organised numerically in order of first citation, not alphabetically.

The Vancouver style takes its name from the 1978 meeting of biomedical journal editors in Vancouver, Canada, which resulted in the Uniform Requirements for Manuscripts Submitted to Biomedical Journals — now maintained by the International Committee of Medical Journal Editors (ICMJE). The ICMJE Recommendations are the authoritative standard for Vancouver formatting.

Vancouver is used by many of the world's most prestigious medical journals, including the New England Journal of Medicine, The Lancet, JAMA, and the British Medical Journal (BMJ).

Who Uses Vancouver Style?

Vancouver is the dominant citation style in:

• Medicine — undergraduate and postgraduate medical education, clinical case reports, research papers
• Nursing — nursing journals, evidence-based practice reports, case studies
• Pharmacy and pharmacology
• Dentistry and oral health sciences
• Biomedical sciences — biochemistry, microbiology, physiology
• Public health and epidemiology

If you are a student in any of these fields and your assignment does not specify a citation style, Vancouver is the most likely expected format. When in doubt, confirm with your lecturer.

Vancouver In-Text Citations

The mechanics of Vancouver in-text citation are simple but have important rules:

Basic Rule: Numbered Superscripts

Place a superscript number in the text at the point of citation, immediately after any punctuation (except a dash) and before a closing parenthesis.

Order of First Appearance

Sources are numbered in the order they are first cited in the text — not alphabetically. If you cite a new source for the first time on page 3, it gets the next available number regardless of the author's surname.

Reusing the Same Number

When you cite a source for the second (or subsequent) time, you use the same number it was assigned the first time. This is one of Vancouver's key features — a reader can look up reference number 7 once and find the same source every time "7" appears.

Citing Multiple Sources at Once

When citing several sources at the same point, list the numbers together separated by commas. Use an en dash for a consecutive series of three or more numbers.

Vancouver Reference List Rules

The reference list in a Vancouver-formatted paper follows these rules:

• Numerical order: References are listed 1, 2, 3... in the order they were first cited — not alphabetically.
• Author names: Surname first, then initials (no periods after initials). List all authors up to six; if more than six, list the first six then add "et al."
• Journal titles: Abbreviated using the NLM (National Library of Medicine) standard abbreviations (e.g., N Engl J Med, not New England Journal of Medicine). Check PubMed journal list for correct abbreviations.
• Article titles: Not italicised and not placed in quotes — written in plain text with standard sentence capitalisation.
• Volume and issue: Volume in bold (in some styles) or plain, followed by issue number in parentheses. Year in parentheses before volume, or after the journal name depending on variant.
• Pages: Use abbreviated page ranges when possible (e.g., 512–8, not 512–518).

Citing Journal Articles in Vancouver

The general format for a journal article is:

Author(s). Title of article. Abbreviated journal name. Year;Volume(Issue):Pages. DOI.

Single Author

Multiple Authors (six or fewer)

More Than Six Authors (et al.)

Online Ahead of Print

Citing Books and Textbooks

General format: Author(s). Title of book. Edition (if not first). City: Publisher; Year. Pages (if citing a specific section).

Entire Book

Chapter in an Edited Book

Electronic Book

Citing Websites and Online Resources

Format: Author/Organisation. Title [Internet]. Publisher/Place: Publisher; Year [updated Year Month Day; cited Year Month Day]. Available from: URL

Organisation Website

Clinical Guideline Online

Citing Conference Papers and Proceedings

Citing Theses and Dissertations

Citing Government and Institutional Reports

Journal Name Abbreviations

Vancouver style requires abbreviated journal titles, not full names. The standard source for correct abbreviations is the National Library of Medicine (NLM) catalogue, accessible via PubMed at ncbi.nlm.nih.gov/nlmcatalog.

Common abbreviated names to know:

Vancouver vs APA — Key Differences for Healthcare Students

Students moving between clinical placements and academic coursework often need to switch between Vancouver and APA. The key mental shift: Vancouver removes author identification from the reading flow entirely, prioritising reader speed. APA keeps author names visible so the reader knows whose work is being cited while reading.

Common Vancouver Citation Mistakes

• Alphabetising the reference list. Vancouver lists are numerical, not alphabetical. This is one of the most common errors.
• Writing the full journal name instead of the abbreviation. Always use the NLM-approved abbreviated form.
• Listing all authors when there are more than six. After the sixth author, write "et al."
• Adding periods after initials. Vancouver author initials have no periods: "Smith JA" not "Smith, J.A."
• Repeating the reference when re-citing it. Use the original number, not a new entry in the reference list.
• Using the wrong DOI format. Vancouver uses doi:10.xxxx/yyyy (with doi: prefix) — different from APA 7's https://doi.org/10.xxxx/yyyy format.
• Incorrect page number abbreviation. Vancouver shortens page ranges: 512–8, not 512–518.

Generate Vancouver Citations with Bibloq

Bibloq's citation generator supports Vancouver style fully — including NLM journal abbreviations, correct author formatting, and the numbered reference list structure. Enter a PubMed URL, DOI, or article details manually, select Vancouver, and your reference is ready to copy. Build your complete reference list, then export or copy the numbered entries to insert directly into your paper.