1. Andrews, D.A., Zinger, I., Hoge, R.D., Bonta, J., Gendreau, P., & Cullen, F.T. (1990). Does correctional treatment work? A clinically relevant and psychologically informed meta-analysis. Criminology, 28, 369–404.
2. Bergin, A.E. (1971). The evaluation of therapeutic outcomes. In A.E. Bergin & S.L. Garfield (Eds.), Handbook of psychotherapy and behavior change: An empirical analysis (pp. 217–270). New York: Wiley.
3. Bergin, A.E., & Lambert, M.J. (1978). The evaluation of therapeutic outcomes. In S.L. Garfield & A.E. Bergin (Eds.), Handbook of psychotherapy and behavior change: An empirical analysis (2nd ed., pp. 139–190). New York: Wiley.
4. Breschmer, B. (1980). In one word: Not from experience. Beta Psychologia, 45, 223–241.
5. Denker, P.G. (1946). Results of treatment of psychoneurosis by the general practitioner. A follow-up study of 500 cases. New York State Journal of Medicine, 46, 2164–2166.