References
- Avolio, B J., Waldman, DA., & Mc Daniel, M.A. (1990) Age and work performance in nonmanagerial jobs: The effects of experience and occupational type. Academy of Management Journal, 33, 407-422.
- Baltes, M.M. (1988) The etiology and maintenance of dependency in the elderly. Three phases of operant research. Behavior Therapy, 19, 301-319.
- Blanchard-Fields, F., & Hess, T.M. (1996) Perspectives on cognitive change in adulthood. New York: McGraw-Hill.