APA aipamena

American Psychological Association. (1996). Psychological methods. American Psychological Association.

Chicago Style aipamena

American Psychological Association. Psychological Methods. Washington, DC: American Psychological Association, 1996.

MLA aipamena

American Psychological Association. Psychological Methods. American Psychological Association, 1996.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.