Objective: To present guidelines for citing online resources in Vancouver style. Methods: A review was carried out of the literature relating to citing online resources in Vancouver style using Yahoo and Google search engines. Results: The Vancouver style of references citation is used primarily for publication in biomedical research. Citation of books, journals, reports, proceedings of seminars/meetings, article in newspapers have specific format. Conclusion: The basic rules of citing online resources do not differ markedly than for print resources. The information about type of medium, date of update/revision, date of citation, Uniform Resource Locator (URL) from which available and system requirements are added while citing online resources.