5Ritzer, G. 1996. Sociological Theory (Fourth Edition). New York: The McGraw-Hill Companies, Inc., pp.6-9, p.49.
6Giddens, A. 1982. Sociology: A Brief but Critical Introduction. London: Macmillan, Pr. Ltd., p.46.
7Cohen, I.B. 1985. Revolution Science, Cambridge, Mass. : the Belknap Press of Harvard University Press. p. 10.
8Weber, M. 1946. "Politics as Vocation" and "Science as Vocation", in Gerth, H. & Mills, C.W. From Marx Weber: Essays in Sociology, New York: Oxford University Press. pp.77 - 159.
9Lecuyer, B., & Oberschall, A. 1968. “Sociology: Early History of Social Research”. in Intermational Encyclopedia of the Social Sciences, Volume 15. New York: Macmillan and Free Press. pp. 36 - 52.
10Timasheff, N. & Theodorson, G. 1976. Sociological theory: Its Nature and Growth, Fourth Edition. New York: Random House. p.87.
