Frank, Arlene F., Gunderson, John G. (1990).The Role of the Therapeutic Alliance in the Treatment of Schizophenia: Relationship to Course and Outcome. Arch Gen Psychiatry; 47 (3): 228-236.
Luborsky, L., Crits-Christoph, P., Mintz, J., and Auerbach, A. (1988). Who Will Benefit from Psychotherapy? Predicting Therapeutic Outcomes. New York: Basic Books.
Orlinsky, D.E., & Howard, K. I. Process and outcome in psychotherapy. (1986) In. S. Garfield and A. Bergin, Eds., Handbook of psychotherapy and behavior change, 3rd ed. New York: Wiley.