Cita APA

Kanfer, F. H., & Goldstein, A. P. (1980). Helping people change: A textbook of methods (2nd ed. --.). New York: Pergamon Press.

Citación estilo Chicago

Kanfer, Frederick H., y Arnold P. Goldstein. Helping People Change: A Textbook of Methods. 2nd ed. --. New York: Pergamon Press, 1980.

Cita MLA

Kanfer, Frederick H., y Arnold P. Goldstein. Helping People Change: A Textbook of Methods. 2nd ed. --. New York: Pergamon Press, 1980.