Vancouver Citation
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What you get with Vancouver Citation
Vancouver is the numeric referencing style of medicine and the health sciences. Sources are numbered in the order they first appear in your text, each number stays with that source for the whole document, and the reference list is arranged in that citation order rather than alphabetically. The conventions come from two related places: the ICMJE Recommendations for the Conduct, Reporting, Editing, and Publication of Scholarly Work in Medical Journals, which grew out of a 1978 meeting of medical editors in Vancouver, and the National Library of Medicine's Citing Medicine (2nd edition), which supplies the detailed format for each reference type. Nursing, medicine, dentistry, pharmacy, public health and biomedical courses in the UK, Ireland, Canada, Australia and the UAE set it, usually through a local university guide; US health-science programmes more often set AMA, a separate numeric style. This page explains how the numbering behaves, how author names, journal abbreviations, capitalisation and DOIs are formatted, and what AMDEX Scholar Labs can check on a reference list you have written.
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How do Vancouver in-text citations work?
A Vancouver in-text citation is an Arabic numeral pointing to a numbered entry in the reference list. The first source you cite becomes 1, the next new source becomes 2, and so on. When you cite a source again later, you reuse its original number rather than issuing a new one, however many times it recurs. The numeral appears in round brackets, square brackets or superscript — three forms of the same device, with one of them used throughout a document. If you name the author in your sentence, the number still appears alongside the name. For a direct quotation, add the page reference to the number.
- Round brackets (1), square brackets [1] or superscript — one form, used consistently
- Several sources at once: (2,5) with commas; (7-10) with a hyphen for runs of three or more
- Author named in the sentence: Ahmed et al. (4) reported a similar reduction
- Quotation with page: (4 p. 112) or [4, p. 112]
Why is a Vancouver reference list numbered instead of alphabetical?
Because in Vancouver the number, not the surname, is the address of the source, and numbers are assigned by order of first appearance. The list therefore runs 1, 2, 3 down the page in the sequence the reader met the sources, and an entry never moves because an author's surname begins with A. The practical consequence is that editing carries more risk than in author-date styles: moving a paragraph, cutting a sentence or inserting a new source mid-draft can shift the numbering of everything after it. Renumber the whole document after any structural edit, then confirm that the highest number in the text matches the final entry in the list.
How many authors do you list before et al. in Vancouver?
The ICMJE Recommendations ask for the first six authors followed by et al. when a source has more than six. NLM's Citing Medicine gives listing every author as its standard practice, while some guides — and AMA, a related numeric style — list all authors up to six and cut to the first three followed by et al. beyond that. This is the one number on the page worth confirming in your own guide rather than assuming, because the three conventions produce visibly different reference lists. The name format itself is stable across variants: surname first, then initials with no full stops and no comma between surname and initials, authors separated by commas, no ampersand before the last, and a full stop closing the element. For example: Smith AB, Okonkwo CE, Lindqvist D. Where a body such as the WHO is the author, use the organisation's name in place of personal names.
How are journal titles, capitalisation and DOIs handled?
Journal titles are abbreviated to the NLM abbreviation for that journal — the form recorded in the NLM Catalog and used in PubMed — rather than spelled out in full or shortened by guesswork. Article and book titles take sentence case: capitalise the first word and proper nouns only, with no quotation marks. A journal reference then closes with year, volume, issue in round brackets, and page range; ICMJE allows the issue number to be omitted where a journal paginates continuously through a volume. Include the DOI where one exists, and for online material add the medium, the date you consulted it and the address.
- Journal pattern: Lancet. 2021;397(10270):220-32.
- Page ranges are commonly condensed (220-32) rather than printed in full
- Online journal article: [Internet] follows the abbreviated journal title, not the article title — BMJ [Internet]. 2021 [cited 2026 Mar 4];372:n71.
- Website, book or report: [Internet] follows the item's own title, then a [cited 2026 Mar 4] date and Available from: with the URL
- Plain type throughout — the NLM pattern does not italicise journal or book titles
Is Vancouver the same as ICMJE, NLM or the numbered style my department uses?
Not exactly. "Vancouver" names a family of numbered biomedical styles descended from the ICMJE Recommendations, with Citing Medicine as the detailed manual sitting behind them; there is no single purchasable volume called the Vancouver manual. Journals and universities each implement it a little differently — brackets versus superscript, the author cut-off, whether issue numbers appear, how secondary sources are treated. Other numbered systems such as AMA and IEEE look similar on the page but are separate styles with their own rules, and footnote styles like Oxford work on an entirely different principle. Identify which of these your department actually means before you format anything: a list of numbered references is not on its own evidence that Vancouver is what has been set. Our comparison of referencing styles sets out the differences side by side.
What can AMDEX Scholar Labs check on a Vancouver reference list?
We check the citations and reference list you have already assembled against the guide your course uses, and explain each correction so you can apply the rule yourself next time. That covers the mechanics numeric styles fail on most often: numbers that no longer run in first-appearance order, a text citation with no matching entry, one source carrying two numbers, journal titles not in the form your guide requires, and capitalisation drifting between sentence and title case. We can also verify entries against the source record, build worked examples for reference types your guide does not illustrate, and support this alongside nursing assignment assistance. Send us your draft list and your guide through contact us to talk through what you need.
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Vancouver Citation: common questions
No. Ibid. and op. cit. belong to footnote systems such as Oxford and Chicago notes, where each citation is a separate note that would otherwise repeat itself. Vancouver has no such problem: a repeated source simply carries the number it was given the first time it appeared, however many pages later it recurs. If you find ibid. in a Vancouver draft, it has usually been carried over from a different style.
You reuse the number it already has. Numbers are assigned once, at first appearance, and stay attached to that source for the rest of the document, so a paper citing eight sources across forty citations still has a reference list of eight entries. If the second mention points to a different page, keep the same number and change the page reference: (4 p. 112) then (4 p. 118).
Guides split on this, and the split does not follow whether your numbers are bracketed or superscript — the same rule applies to both forms. The widely published practice places the number outside the full stop or comma, so the sentence closes and the number follows it; a number of journals and departments set it inside instead. Pick the placement your guide specifies and apply it everywhere. The number itself normally sits at the end of the clause or sentence containing the material, but when it belongs to one item in a list or one clause of a longer sentence, place it directly after that item rather than saving it for the end.
Use the organisation as the author. Give the body's name, then the title in sentence case followed by [Internet], then place and publisher, the year, a cited date and Available from: with the URL — World Health Organization. Physical activity [Internet]. Geneva: WHO; 2024 [cited 2026 Mar 4]. Available from: https://www.who.int/news-room/fact-sheets/detail/physical-activity. If no organisation can be identified, begin the entry with the title. Personal communications are cited in the text only and kept out of the reference list.
No — alphabetising breaks the style. In Vancouver the entry number is what links a citation in the text to its source, so the list must stay in citation order for the numbers to lead anywhere. An alphabetised Vancouver list is one of the quickest errors for a marker to spot. If your reference manager has reordered the list, switch its output style to Vancouver and regenerate, then check the sequence by hand.
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