1. Agras, W. S. (1993). Adherence intervention research: The need for a multilevel approach. In N. A. Krasnegor, L. Epstein, S. B. Johnson, S. J. Johnson, & S. J. Yaffe (Eds.), Developmental aspects of compliance behavior, (pp. 285–302). Hillsdale, NJ: Erlbaum.
2. Bandura, A. (1969). Principles of behavior modification. New York: Holt, Rinehart & Winston.
3. Bandura, A. (1982). Self-efficacy mechanism in human agency, American Psychologist, 37, 122–147.
4. Bandura, A. (1989). Human agency in social cognitive theory, American Psychologist, 44, 1175–1184.
5. Barbarin, O. A., Whitten, C. F., & Bonds, S. M. (1994). Estimating rates of psychosocial problems in urban and poor children with sickle cell anemia, Health and Social Work, 19(2), 112–119.