Cita APA (7th ed.)

Duffy, K. G. (1990). Personal growth and behavior 90/91. Dushkin.

Cita Chicago (17th ed.)

Duffy, Karen G. Personal Growth and Behavior 90/91. Dushkin, 1990.

Cita MLA (9th ed.)

Duffy, Karen G. Personal Growth and Behavior 90/91. Dushkin, 1990.

Atenció: Aquestes cites poden no estar 100% correctes.