See this example properly formatted in the QUT Cite tool.
Vancouver is a numbered referencing style that is commonly used in the health and science disciplines. It consists of two elements - the in-text citation and the reference list. Both are required for your referencing to be correct. The in-text citation is indicated by a number, and a sequentially numbered reference list at the end of your document provides the full details of the corresponding in-text reference.
There are a few variations on Vancouver style. The templates and examples in this guide are based on the AMA Manual of Style (11th ed.). You can consult this source directly for more detailed information and examples.