Tolong jelaskan mengenai Sumber dari Kebersihan ras

Glad, John. (2008). Future Human Evolution: Eugenics in the Twenty-First Century. Hermitage Publishers.

Joseph, J. (2004). The Gene Illusion: Genetic Research in Psychiatry and Psychology Under the Microscope. New York: Algora. (2003 United Kingdom Edition by PCCS Books)

Joseph, J. (2006). The Missing Gene: Psychiatry, Heredity, and the Fruitless Search for Genes. New York: Algora.

Paul, Diane B. Controlling Human Heredity, 1865 to the Present. New Jersey: Humanities Press, 1995.

Proctor, Robert. Racial Hygiene: Medicine Under the Nazis. Cambridge, Mass.: Harvard University Press, 1988.