1. Akiskal, H. S., & McKinney, W. T. (1975). Overview of recent research in depression.Archives of General Psychiatry, 32 285?305.
2. Atkinson, R. C., & Shiffrin, R. M. (1968). Human memory: A proposed system and its control processes. In K. W. Spence & J. T. Spence (Eds.),The psychology of learning and motivation: Advances in research and theory (Vol. 2, pp. 89?195). New York: Academic Press.
3. Beck, A. T. (1976).Cognitive therapy and the emotional disorders. New York: International Universities Press.
4. Beck, A. T., Ward, C., Mendelson, M., Mock, J., & Erbaugh, J. (1961). An inventory for measuring depression.Archives of General Psychiatry, 4 561?571.
5. Berndt, D. J., & Berndt, S. M. (1980). Relationship of mild depression to psychological deficit in college students.Journal of Clinical Psychology, 36 864?874.