Ethical principles of psychologists (Amended June 2, 1989) /
[American Psychological Association].

APA Citation

American Psychological Association. (1990). Ethical principles of psychologists (Amended June 2, 1989). [Washington, D.C.]: The Association.

MLA Citation

American Psychological Association. Ethical Principles of Psychologists (Amended June 2, 1989). [Washington, D.C.]: The Association, 1990.

Warning: These citations may not always be complete (especially for serials).