1. Abramson, L. Y., Seligman, M. E. P., and Teasdale, J. D. (1978). Learned helplessness in humans: Critique and reformulation. Journal of Abnormal Psychology, 87, 49–74.
2. Arnkoff, D. B. (1980). Psychotherapy from the perspective of cognitive theory. ln M. Mahoney (Ed.), Psychotherapy process: Current issues and future directions (pp. 339–361 ). New York: Plenum Press.
3. Beck, A. T. (1978). Depression inventory. Philadelphia: Center for Cognitive Therapy.
4. Beck, A. T., and Emery, G. (1985). Anxiety disorders and phobias: A cognitive perspective. New York: Basic Books.
5. Beck, A. T., Rush, A. J., Shaw, B. F., and Emery, G. (1979). Cognitive therapy of depression. New York: Guilford Press.