8P. L. Vanden Berghe, “The Dynamics of Racial Prejudice: An Ideal -Type Dichotomy”, in Social Force, 37, 1958, pp. 138 -141
9Alvin M. Josephy Jr., Joane Nagel and Troy Johnson ( eds.), Red Power: The American Indians' Fight for Freedom, 2^nd,Lincoln and London, University of Nebraska Press, 19990