1. Abramson, L., Metalsky, G., & Alloy, L. (1989). Hopelessness depression: A theory-based subtype of depression. Psychological Review, 96, 358–372.
2. Abramson, L., Seligman, M., & Teasdale, J. D. (1978). Learned hopelessness in humans: Critique and reformulation. Journal of Abnormal Psychology, 87, 49–74.
3. Alloy, L., & Abramson, L. (1988). Depressive realism: Four theoretical perspectives. In L. Alloy (Ed.), Cognitive processes in depression (pp. 223–265). New York: Guilford Press.
4. American Psychiatric Association. (1987). Diagnostic and statistical manual of mental disorders (3rd ed., rev.). Washington, DC: Author.
5. Barker, W. A., Scott, J., & Eccleston, D. (1987). The Newcastle Chronic Depression Study: Results of a treatment regime. International Clinical Psychopharmacology, 2, 261–272.