Vancouver Citation Style Guide (2026)

Vancouver citation style is the standard reference format for biomedical publishing, used by thousands of health sciences journals worldwide including the BMJ, The Lancet, PLOS Medicine, and hundreds of specialty clinical publications. Named after a 1978 meeting of medical editors in Vancouver, Canada, it is maintained by the International Committee of Medical Journal Editors (ICMJE) and forms the basis of ICMJE referencing guidelines that govern submission requirements across the majority of peer-reviewed medical literature.

The system is built around numbered sequential citations: each source receives a number when it first appears in the text, and that number is reused every time the same source is cited again. The numbered reference list at the end of the document is arranged in order of first citation — not alphabetically, which is the single most important difference to understand if you are transitioning from APA or Harvard style.

This guide covers everything you need to cite correctly in Vancouver style: the core formatting rules, copy-ready examples for every common source type, the key differences between Vancouver and closely related styles like AMA, and the most common errors that result in manuscript returns. After reading, run your reference list through an automated reference checker to catch any remaining errors before submission.

What Is Vancouver Citation Style?

Vancouver style emerged from a meeting of editors from major medical journals who gathered in Vancouver in 1978 to agree on uniform requirements for manuscript submission. The resulting guidelines were adopted first by the participating journals and gradually became the de facto standard for biomedical publishing globally. The ICMJE, which grew out of that original meeting, now publishes and maintains the Recommendations for the Conduct, Reporting, Editing, and Publication of Scholarly Work in Medical Journals — the authoritative source for Vancouver referencing requirements.

The system is designed for the specific demands of scientific communication. Numbered citations keep the prose clean and uninterrupted, which matters in clinical and laboratory writing where dense statistical methodology or complex treatment protocols already impose heavy cognitive load on readers. A paper reporting a randomised controlled trial may contain 60 or more citations across a 4,000-word manuscript; parenthetical author-date citations like those in APA would fragment the text significantly.

Vancouver Core Formatting Rules

These rules apply across all Vancouver citations. Mastering them once allows you to apply them consistently across every source type.

Vancouver Reference Examples by Source Type

The following examples are formatted for Vancouver style following ICMJE recommendations. Adapt them for your own references, then verify against your target journal's specific guidelines.

Vancouver vs AMA: Key Differences

Vancouver and AMA are the two most widely encountered numbered citation styles in health sciences publishing. They share the same core logic — numbers in order of first citation, reference list in numerical order — but differ in several formatting details that matter for manuscript submission.

Most Common Vancouver Citation Errors

These errors appear most frequently in Vancouver-formatted manuscripts and are among the most likely to trigger a return from journal editorial staff or a request for major revisions.

Best Practices for Vancouver Referencing

Frequently Asked Questions

Conclusion

Vancouver citation style is built around a straightforward principle — number your sources in order of first use and keep those numbers consistent throughout your document. Once you understand that core logic, and the specific formatting conventions that go with it (NLM journal abbreviations, the [Internet] label for online sources, the 6-author threshold before et al.), applying Vancouver correctly becomes reliable and fast.

The most important practical step is always to verify your reference list against the specific author guidelines of your target journal before submission. Vancouver is a framework, not a single standard, and journal-level variations — particularly around DOI format and in-text citation style — are common enough that assumptions from previous submissions can introduce errors.

Before you submit, run your complete reference list through an automated reference checker and click every DOI to confirm it resolves to the correct paper. The combination of a configured reference manager, a final automated check, and DOI verification eliminates the vast majority of Vancouver citation errors before they reach an editor or reviewer.