JC. Systems of psychotherapy: a transtheoretical analysis. 9th ed. New York: Oxford University Press, 2018. . External links Pro-Change Behavior Systems, Inc. Company founded by James O. Prochaska. Mission is to enhance the well-being of individuals and organizations through the scientific development and dissemination of Transtheoretical Model-based change management programs. Behavior modification Health promotion Integrative psychotherapy Psychotherapeutical theories Psychological models Public health Stage theories