1. Alford, B. A., & Beck, A. T. (1998). The integrative power of cognitive therapy. New York, NY: Guilford Press.
2. Alloy, L. B., & Abramson, L. Y. (1988). Depressive realism: Four theoretical perspectives. In L. B. Alloy (Ed.), Cognitive processes in depression (pp. 223–265). New York, NY: Guilford Press.
3. Beck, A. T. (1967). Depression: Causes and treatment. Philadelphia, PA: University of Philadelphia Press.
4. Beck, A. T., Rush, A. J., Shaw, B. F., & Emery, G. (1979). Cognitive therapy of depression. New York, NY: The Guilford Press.
5. Bellg, A. J., Borrelli, B., Resnick, B., Hecht, J., Minicucci, D. S., Ory, M., et al. (2004). Treatment Fidelity Workgroup of the NIH Behavior Change Consortium. Enhancing treatment fidelity in health behavior change studies: Best practices and recommendations from the NIH Behavior Change Consortium. Health Psychology, 23(5), 443–451.