APA
American psychological Association, . (2001). Publication manual of the American psychological association. U.S.A: American [Psychological Association.
Chicago
American psychological Association, . 2001. Publication manual of the American psychological association. U.S.A: American [Psychological Association.
Harvard
American psychological Association, . (2001). Publication manual of the American psychological association. U.S.A: American [Psychological Association.
MLA
American psychological Association, . Publication manual of the American psychological association. U.S.A: American [Psychological Association. 2001.
