Alexander, Michelle editor. The New Jim Crow: Mass Incarceration in the Age of Colorblindness. New York: The New Press, 2011
Appiah, K. Anthony and Amy Gutmann. Color Conscious: The Political Morality of Race. New Jersey: Princeton University Press, 1996
Aspinal, Peter J. “‘Mixed Race’, ‘Mixed Origins’ or What?’.” Anthropology Today. Vol.25, No.2, 2009, pp. 1-8.