1. Baltes, P. B., Reese, H. W., and Lipsitt, L. P. (1980). Life-span developmental psychology.Ann. Rev. Psychol. 31: 65?100.
2. Beech, R. P., and Schoeppe, A. (1974) Development of value systems in adolescents.Develop. Psychol. 10: 644?656.
3. Brandtstädter, J. (1984). Personal and social control over development: Some implications of an action perspective in life-span developmental psychology. In Baltes, P. B., and Brim, O. G. (eds.),Life-Span Behavior and Development (Vol. 6). Academic Press, New York.
4. Connell, J. P. (1985). A new multidimensional measure of children's perceptions of control.Child Develop. 56: 1018?1041.
5. Crandall, V. C., Katkovsky, W., and Crandall, V. J. (1965). Children's beliefs in their own control of reinforcements in intellectual-academic situations.Child Develop. 36: 91?109.