1. American Psychological Association. Guidelines for psychologists conducting growth groups. American Psychologist, 1973, 28, 933. (a).
2. American Psychological Association. Ethical principles in the conduct of research with human participants. Washington, D.C.: Author, 1973. (b).
3. American Psychological Association. Standards for educational and psychological tests. Washington, D.C.: Author, 1974.
4. American Psychological Association. Ethical standards of psychologists (1977 rev.). Washington, D.C.: Author, 1977. (a).
5. American Psychological Association. Standards for providers of psychological services. Washington, D.C.: Author, 1977. (b).