Adelman, Irma and Cynthia Toft Morris .Economic Growth and Social Equity in Developing Countries. Standard, California, Standard University Press, 1973.
2.
Allport, Gordon.The Nature of Prejudice. Cambridge, Mass., Addison-Wesley, 1954.
3.
Banton, Michael and Jonathan Harwood .The Race Concept. New York , Praeger, 1975.
4.
Leach, Edmund. "Caste, Class and Slavery: The Taxonomic Problem," Caste and Race: Comptrative Approaches, A. de Renck and J. Knight, eds., Boston , Little Brown, 1967.
5.
Manley, Michael.The politics of Change. Washington, D.C., Howard University Press, 1975.
6.
Montague, Ashley.Man's Most Dangerous Myth, 5th edition, New York, Oxford University Press, 1974.
7.
Rousseau, J.J.A Dissartatian on the Origin and Foundation of the Inequality of Mankind. Everyman edition, p. 160. Quoted in T.B. Bottomore , Classes in Modern Society, New York, Random House, 1968.
8.
Theilbar, Gerald W. and Saul D. Thielbar, eds. Issues in Social Equality. Boston, Little Brown, 1972.
9.
Ward, Barbara.Rich Nations and Poor Nations, New York, W. W. Norton, 1962.
