APA-referens (7:e uppl.)

Prochaska, J. o., & Norcross, J. C. (1994). Systems of psychotherapy: A transtheoretical analysis (3rd ed.). Brooks/Cole.

Chicago-referens (17:e uppl.)

Prochaska, James o., och John C. Norcross. Systems of Psychotherapy: A Transtheoretical Analysis. 3rd ed. California: Brooks/Cole, 1994.

MLA-referens (9:e uppl.)

Prochaska, James o., och John C. Norcross. Systems of Psychotherapy: A Transtheoretical Analysis. 3rd ed. Brooks/Cole, 1994.