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.