APA aipamena

American Psychological Association. (1959). Directory. New York: American Psychological Association.

Chicago Style aipamena

American Psychological Association. Directory. New York: American Psychological Association, 1959.

MLA aipamena

American Psychological Association. Directory. New York: American Psychological Association, 1959.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.