APA (7th ed.) Citation

Prochaska, Norcross, & DiClemente. (2002). Changing for good. Quill.

Chicago Style (17th ed.) Citation

Prochaska, Norcross, and DiClemente. Changing for Good. New York: Quill, 2002.

MLA (8th ed.) Citation

Prochaska, et al. Changing for Good. Quill, 2002.