There are several citation style guides used by various academic disciplines.  The one primarily used for Psychology is the APA style guide. Please check with your instructor for their preferred style.
 

Print formats of the APA manual (7th ed.) are available in the VIU Library Collection:

• Publication manual of the American Psychological Association, 7th ed
  Call Number: BF 76.7 P83 2020 ARDC (Nanaimo, Cowichan, & Powell River) (2 copies in Stacks)

 There are also brief online guides (links below):