Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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