Vancouver, a "numbered" style, follows rules established by the International Committee of Medical Journal Editors . It is also known as: Uniform Requirements for Manuscripts Submitted to Biomedical Journals; from Monash Univeristy
International Committee of Medical Journal Editors (ICMJE) Uniform Requirements for Manuscripts Submitted to Biomedical Journals: Sample References; from the National Library of Medicine / National Institutes Health
From the University of Auckland, Philson Library; Provides basic elements of a reference, shows examples of different types of references for journal articles, books, web sites. etc, shows features of the Vancouver style such as layout and punctuation.