1. Aristotle, Nichomachean Ethics, transl. by David Ross, Oxford University Press, New York, 1968.
2. Barrett, R. S., Performance Rating, Science Research Associates, Chicago, 1966.
3. Campbell, J. P., Dunnette, M. D., Lawler, E. E. III, and Weick, K. E., Managerial Behavior, Performance and Effectiveness, McGraw-Hill, New York, 1970.
4. Devlin, P., The Enforcement of Morals, Oxford University Press, New York, 1971.
5. DeVries, D. L., Morrison, A. M., Shullman S. L., and Gerlach, M. L., Performance Appraisal on the Line, Center for Creative Leadership, Greensboro, N. C., 1980.