Nine-nation comparison. American Journal of sociology , ٨٩:٣, ١٩٨٣,pp.٦١٢-٦٥٠.

TUMIN, MELVIN M , Some Principles of stratification: A critical analysis. American Sociological Review, ١٨,١٩٥٣, pp. ٣٧٨-٣٩٤.

__________. Rewards and task orientation. American Sociologcal Review , ٢٠, ١٩٥٥, pp. ٤١٩-٤٢٣.

__________. On inequality,American Sociological Review, ٢٨, ١٩٦٣,pp.١٩-٢٦.

TYREE, ANDREA, MOSHE SEMYONOV, and ,ROBERT W. HGDE. Gaps and glissando: Inequality, economic develipment, and social mobility in ٢٤ countries, American Sociological Reivew , ٤٤,١٩٧٩,pp.٤١٠-٤٢٤.

USEEM, MICHAEL, The inner group of the American capitalist class, Social Problems, ٢٥,١٩٧٨,pp.٢٢٥-٢٤٠.

__________. the social organization of the Amercan business elite and Participation of corportion directors in the governance of american institutions. American sociological Review , ٤٤,١٩٧٩,pp.٥٥٣-٥٧٢.

__________. Corporations and the corporate elite, Annual Review of Sociology , ٦,١٩٨٠.Palo Alto, Calif: Annual Reviews.

__________. the Inner Circle: Large Corpotarions and the Rise of the Business Political Activity in the U.S. and U.K. New York: Oxford University Press, ١٩٨٤.

VANFOSSEN, BETH E The Structure of social Inequality , Boston: Little Brown., ١٩٧٩.

VOSLENSKY, MICHAEL. Nomenklatura : the soviet Ruling Class. New York: Doubleday, ١٩٨٤.

WALKER, PAT. Between Labor and Capital. Boston, mass: South End Press, ١٩٧٩.

WALLERSTEIN, IMMANUEL. The Modern wordern system, New York: Academic Press, ١٩٧٤.

__________. the Capitalist world-Economy. New York: Cambrdige University Press,١٩٧٩.

WEBER, MAX , From max Weber: Essays in Siciology, H.H Gerth and C.Wright Mills (trans./eds.). New Yoek: Oxford University Press, ١٩٤٦.

__________. the Religion of China. New York: Free Press,١٩٥١.