Παραπομπή APA

Prochaska, J. O., & Norcross, J. C. (2007). Systems of psychotherapy: A transtheoretical analysis (6th.). Thomson Brooks/Cole.

Παραπομπή Chicago Style

Prochaska, James O., και John C. Norcross. Systems of Psychotherapy: A Transtheoretical Analysis. 6th. California: Thomson Brooks/Cole, 2007.

Παραπομπή MLA

Prochaska, James O., και John C. Norcross. Systems of Psychotherapy: A Transtheoretical Analysis. 6th. Thomson Brooks/Cole, 2007.