APA Style

PROCHASKA, J, O., Norcross, J, C. (2007). System of Psychotherapy: a transtheoretical analysis, 6th ed (6). Australia: Thomson.

MLA Style

PROCHASKA, JAMES, O.., Norcross, John, C.. "System of Psychotherapy: a transtheoretical analysis, 6th ed". 6 Australia: Thomson, 2007. Text.