This is the Vancouver style for referencing, used at the Univerity of Portsmouth within the School of Pharmacy and Biomedical Sciences and the Radiography departments.
This guide is modelled on Citing Medicine: The NLM Style Guide for Authors, Editors, and Publishers (2nd edition). You may wish to consult this source directly for additional information or examples.
In Vancouver you use running numbers in the text of your work to number the first use of a reference. You then list your references in that running number order. This does mean that if you go back and insert a new reference into your text you have to re-number all the references that follow.
Check with your unit or course handbook whether a particluar style of in-text numbering should be used - there are two systems:
Parentheses () or Superscript Superscript
The reference list uses plain numbers with no parenthesis or superscript:
1. Smith ....
2. Jones ....