APA (7th ed.) Citation

American Psychological Association, Norcross, J. C., VandenBos, G. R., & Freedheim, D. K. (2011). History of psychotherapy: Continuity and change (2nd ed.). American Psychological Association.

Chicago Style (17th ed.) Citation

American Psychological Association, John C. Norcross, Gary R. VandenBos, and Donald K. Freedheim. History of Psychotherapy: Continuity and Change. 2nd ed. Washington, D.C.: American Psychological Association, 2011.

MLA (9th ed.) Citation

American Psychological Association, et al. History of Psychotherapy: Continuity and Change. 2nd ed. American Psychological Association, 2011.