The English version of the reference style is preinstalled in EndNote.
If you are writing in Norwegian you can download a Norwegian version of the APA style from UNIT's webpages.
You can download other output styles at Endnote's webpages.
Unsure of which fields to fill in in your EndNote post? In The Citation Compass you will find the answer.
You can modify Endnote styles. Video: Modyfing EndNote Styles