4Deanna L. Pagnini and Morgan, S. Philip. 1990. "Intermarriage and Social Distance among U. S. Immigrants at the Turn of the Century", American Journal of Sociology, Volume 96 Number 2 (September 1990). pp406.
5Simpson, G. E. and Yinger, J. M. 1985. Racial and Cultural Minorities. An Analysis of Prejudice and Discrimination (Fifth) . Plenum Press, New York and Lon-don. pp21-23.
6Richard T. Schaefer. 1998. Racial and Ethnic Groups ( Seventh Edition). Addition--Wesley Educational Publishers Inc. pp75.
7Park, Robert E and Burgess, Ernest W. 1924. Introduction to the Science of Sociology. Chicago: University of Chicago Press. pp440.
8Bogardus, Emory S. 1928. A History of Social Thought, Los Angeles. Jesse Ray Miller.
9Lieberson , Stanley, & Waters, Mary C. 1988. From Many Strands: Ethnic and Racial Groups in Contemporary America. Russell Sage Foundation/ New York. pp205,210, 217-218.
10Lieberson , Stanley, & Waters, Mary C. 1988. From Many Strands: Ethnic and Racial Groups in Contemporary America. Russell Sage Foundation/ New York. pp217.