APA (7th ed.) Citation

Papp, P. (1983). The process of change. Guilford Press.

Chicago Style (17th ed.) Citation

Papp, Peggy. The Process of Change. New York [etc.]: Guilford Press, 1983.

MLA (9th ed.) Citation

Papp, Peggy. The Process of Change. Guilford Press, 1983.