6Cappelli, P. , and P. D. Sherer. 1990. Assessing worker attitudes under a two -tier wage plan. Industrial and Labor Rela- ms Review, 43 (2) : 225 - 244.
7Cowherd, D. M. , and Levine, D. I. 1992, Product Quality and Pay Equity between Lower-level Employees and Top Management : An Investigation of Distributive Justice Theory. Administrative Science Quarterly, 37 (2) : 302 - 320
8Deutsch, M. 1955. Distributive justice: a social -psychological perspective. New Haven, CT: Yale University Press, 2-21
9Festinger, Leon. 1954. A theory of social comparison processes. Human Relations, 7:117 - 140.
10Greenberg, J. 1987. A taxonomy of organizational justice theories. Academy of Management Review, 12 ( 1 ) : 9 - 22.
