The University Library at the Karolinska Institute have a reference guide to the common reference styles APA and Vancouver.
Let a computer program write the references for you
Too complicated to write the entire reference list yourself? Let the computer write them for you – there are applications and web services that can help you write references correctly.
For those who are employed at DS, Karolinska or SÖS:
EndNote is a software for collecting and citing scholarly references. If you work at Danderyds sjukhus, Karolinska Universitetssjukhuset or Södersjukhuset, you can get EndNote with no charge on your work computer and personal computer. The libraries offer support in EndNote and EndNote Online.
For those who are employed within SLSO or another unit with a library contract:
EndNote Online is a free version of the reference management program EndNote. You can get courses and support in EndNote Online at the libraries at DS, Karolinska or SÖS. Another option is to use Zotero, a free reference management program. You can get courses and support in Zotero at the library at Karolinska.