Vancouver referencing looks deceptively simple. In the text, a source is just a number. In the reference list, sources appear in numerical order, each entry a compact string of names, a title, a journal abbreviation, and a cluster of numbers. There is no author and year to remember, no alphabetical list to maintain, and no long in-text citation interrupting your sentences. That simplicity is exactly why it is easy to get wrong in small ways that markers notice: a journal title written out in full instead of abbreviated, an author list punctuated as if it were Harvard, a page range formatted with spaces where Vancouver allows none, or a reference list reordered alphabetically out of habit. This guide shows you how to reference a journal article in Vancouver style correctly, step by step, with the variations your university or journal may require.
Vancouver is a numbered, citation-sequence style used mainly in medicine and the health sciences. It is governed by the International Committee of Medical Journal Editors, through their Recommendations for the Conduct, Reporting, Editing and Publication of Scholarly Work in Medical Journals, and the detailed formatting follows the United States National Library of Medicine’s Citing Medicine. Universities and journals publish their own Vancouver guides based on those sources, and the small details, whether in-text numbers sit in brackets or as superscripts, whether more than six authors are listed in full, and whether a DOI is required, vary from one guide to another. The pattern in this guide follows the widely used NLM form. Check your own library guide or your target journal’s instructions and follow them wherever they differ.
How Vancouver numbering works
The core rule of Vancouver is order of first appearance. The first source you cite in your text becomes number 1, the next new source becomes number 2, and so on, in the order sources first appear. The reference list at the end of your work is arranged in that same numerical order, not alphabetically. If you cite source 1 again later in the text, it keeps the number 1. It does not get a new number, and it does not get a second entry in the reference list. That rule is the one students break most often, usually because they are used to alphabetical styles where every entry sits in a fixed position. In Vancouver, the position of an entry is determined by your writing, not by the alphabet.
In the text, the number appears either in brackets or as a superscript, depending on your guide. Both forms below are correct in their respective versions, and you should use one consistently throughout a piece of work, never both. Bracketed numbers look like this: hand hygiene reduces transmission [1]. Superscript numbers look like this: hand hygiene reduces transmission.1 In some guides the number sits inside round brackets, as (1), rather than square brackets. The placement rule is the same in all versions: put the number immediately after the fact, claim, or author it supports, normally at the end of the sentence or clause, before the full stop in the superscript form and according to your guide’s punctuation in the bracketed form.
Multiple sources are cited together with commas and ranges. Two separate sources appear as [1, 4], while a run of consecutive sources appears as a range, [2-5], rather than listing each number. You can still name authors in your sentence, and when you do, the number follows the name: Watson and Crick [3] described the double helix. If you quote directly, add the page number after the citation number, following your guide’s form, for example [2, p. 102] or a superscript with the page in brackets. The reference list entry itself does not change when you quote; the page detail belongs in the text citation only.
The reference list format for a journal article
The standard Vancouver format for a journal article in the reference list is as follows. Each element follows the previous one in a fixed order, with fixed punctuation, and learning that punctuation is most of the work of learning Vancouver.
Author Surname Initial(s), Author Surname Initial(s). Title of article. Abbreviated Journal Title. Year;Volume(Issue):Pages.
Work through that template piece by piece. Authors are written as surname followed by initials, with no full stops or spaces between the initials, and commas between authors: Watson JD, Crick FHC. There is a full stop after the final author’s initials, and then the article title, in sentence case, with no quotation marks and no italics. After the title comes a full stop, then the abbreviated journal title, followed by a full stop. Then the year, a semicolon, the volume number, the issue number in round brackets with no space before it, a colon, and the page range with no spaces. The whole date and volume cluster reads as one compact unit: 1953;171(4356):737-8.
Here is the template filled in with the most famous journal article in biology, which also happens to be a perfect Vancouver example because it is short, has two authors, and follows the standard pattern exactly.
Watson JD, Crick FHC. Molecular structure of nucleic acids: a structure for deoxyribose nucleic acid. Nature. 1953;171(4356):737-8.
Notice the details that make that entry correct. The journal title is abbreviated to Nature, which in this case is already short, but for most journals the abbreviation is much shorter than the full title: the New England Journal of Medicine becomes N Engl J Med, and the British Medical Journal becomes BMJ. The page range is shortened, 737-8 rather than 737-738, which is the Vancouver convention of dropping repeated digits, though some guides now prefer the full range, so check yours. The year has no month in this example because the article’s citation in the NLM form gives the year alone, but many journal articles include a month and day where the journal publishes that way, as in the next example.
Halpern SD, Ubel PA, Caplan AL. Solid-organ transplantation in HIV-infected patients. N Engl J Med. 2002 Jul 25;347(4):284-7.
That example shows the fuller date form: year, abbreviated month, and day, followed by a semicolon and the volume and issue cluster. The month is abbreviated to three letters, Jul, with no full stop. If your article was published online before print, or if your guide requires it, add the DOI at the end of the entry, after the page range, in the form doi:10.xxxx/yyyy. For an article published online, you may also need to add the medium and access information, as covered below.
Journal abbreviations, author lists, and page numbers
Journal abbreviations cause more Vancouver errors than any other element, because they feel unnatural to writers used to full titles. Vancouver requires the abbreviation used by the National Library of Medicine, as listed in the NLM Catalog, not an abbreviation you invent and not the full title. The Lancet becomes Lancet, the Journal of the American Medical Association becomes JAMA, and the Journal of Clinical Nursing becomes J Clin Nurs. The reliable way to find an abbreviation is to look at how the article itself is cited in PubMed, which displays the NLM abbreviation, or to search the NLM Catalog for the journal. Copying the abbreviation from PubMed avoids the common error of abbreviating a word that the NLM leaves in full, or leaving in full a word that the NLM abbreviates.
Author lists have their own rule, and it changed recently enough to cause confusion. The traditional Vancouver rule is to list up to six authors, and if there are more than six, list the first six followed by “et al.” So an article with eight authors appears with six names and et al. in the reference list. The National Library of Medicine itself now lists all authors in its own databases, and some journals and universities have followed that change, while others still require the six-author rule. This is one detail where your guide or your target journal is decisive: check whether it says “list up to six authors then et al.” or “list all authors”, and follow it exactly. Whichever rule applies, the author format is the same: surname, initials without full stops, commas between authors, and no “and” before the final author.
Page numbers follow two conventions you should know. The first is the shortened range already mentioned: 737-8 for pages 737 to 738, and 284-7 for pages 284 to 287, where repeated leading digits are dropped. The second is that some guides, and some journals, now ask for the full range, 737-738, because shortened ranges can be misread by reference management software. Neither is wrong in itself, but mixing them in one list looks careless, so pick your guide’s convention and use it for every entry. Article numbers, used by journals that publish online without page numbers, replace the page range: after the volume and issue, give the article number as published, for example 2024;14(2):e12345, following the journal’s own form.
Online articles, DOIs, and articles with no author
Most journal articles students cite today are read online, and Vancouver handles that with additions to the standard entry rather than a different format. If the article has a DOI, add it at the end of the entry. If your guide requires an access date or a URL for online articles, add them after the DOI or in place of it, in the form your guide specifies, commonly “Available from: URL” followed by the date cited in square brackets, as in [cited 2025 May 12]. The core entry, authors, title, abbreviated journal, date, volume, issue, and pages, does not change because you read the article online. The online details are an addition, not a replacement.
Articles published online ahead of print, before they have a volume, issue, or page range, are cited with the information available: authors, title, abbreviated journal, year, and the DOI, plus a note that the article is published online ahead of print where your guide requires it. Do not invent a volume or page range for an ahead-of-print article, and update the reference if the final version appears before you submit. Articles with no named author, such as some editorials, begin with the title instead of an author, and the in-text citation uses the reference number as usual, so the absence of an author causes no problem in the text. Corporate authors, such as a research group or a health organisation, are cited under the organisation’s name in the author position, in the same surname-initials pattern adapted to the organisation’s name as your guide directs.
One further variation deserves mention because it surprises students who switch between styles. Vancouver reference lists are never alphabetical, never grouped by source type, and never split into separate lists for books and articles unless a specific journal asks for it. Every source you cited, in the order you first cited it, appears in a single numbered list titled References. If you add a new source to the middle of your text during revision, every source cited after it must be renumbered, which is why reference management software is particularly valuable for Vancouver work. Renumbering by hand across a long dissertation is slow and error-prone, and a single missed renumbering breaks the link between every later citation and its entry. If you are formatting a list by hand, or checking software output, our free Vancouver Referencing Generator builds Vancouver entries from the details you enter, so you can compare its output against the pattern in this guide before you finalise your list.
Common mistakes to check before you submit
Run through a short checklist before you submit any Vancouver work. First, is the list in numerical order of first citation, not alphabetical order? Second, does every in-text number have exactly one matching entry, and does every entry correspond to at least one in-text citation? A reference list entry with no in-text citation is an uncited source, and an in-text number with no entry is a broken link. Third, are all journal titles abbreviated in the NLM form, with no full titles slipped in? Fourth, are author initials written without full stops and without the word “and”? Fifth, is the date and volume cluster compact, with no spaces around the semicolon, brackets, or colon? Sixth, have you used one in-text form, brackets or superscript, consistently throughout?
Two further checks catch errors that the checklist above misses. Check that you have reused numbers rather than assigning new ones when you cite a source again, and check that any range citation, such as [2-5], really does refer to consecutive sources in your list. A range that skips a number, or a reused source given a fresh number halfway through, will confuse a reader and cost marks for referencing accuracy even when the content is strong. Vancouver rewards precision in small things, because the system is designed to be compact, and compact systems have nowhere to hide an error. Get the numbers, the abbreviations, and the punctuation right, and the reference list does its job invisibly, which is exactly what a good reference list should do.
Frequently asked questions
What is the Vancouver format for a journal article? Author Surname Initial(s). Title of article. Abbreviated Journal Title. Year;Volume(Issue):Pages. For example: Watson JD, Crick FHC. Molecular structure of nucleic acids: a structure for deoxyribose nucleic acid. Nature. 1953;171(4356):737-8.
Are Vancouver references in alphabetical or numerical order? Numerical order, by first appearance in the text. The first source cited is number 1, the next new source is number 2, and the reference list follows that order. A source cited again keeps its original number.
Do I use the full journal title or an abbreviation in Vancouver? The NLM abbreviation, as listed in the NLM Catalog or shown in PubMed. The New England Journal of Medicine becomes N Engl J Med. Do not write journal titles out in full unless your guide specifically asks for it.
How many authors do I list in a Vancouver reference? Traditionally up to six authors, followed by et al. if there are more. The NLM now lists all authors in its databases, and some guides have adopted that rule, so check your university guide or target journal and follow whichever rule it states.
Should in-text Vancouver citations be in brackets or superscript? Either, depending on your guide. Some versions use bracketed numbers [1], others use superscript numbers, and some use round brackets (1). Use one form consistently throughout a piece of work, and place the number immediately after the claim it supports.
Where does the DOI go in a Vancouver journal reference? At the end of the entry, after the page range, in the form doi:10.xxxx/yyyy. If your guide also requires a URL and access date for online articles, add them in the form your guide specifies, after the DOI.