Barkan, E. (1992). Retreat of scientific racism: Changing concepts of race in Britain and the United States between the world wars. Cambridge University Press.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিBarkan, Elazar. Retreat of Scientific Racism: Changing Concepts of Race in Britain and the United States Between the World Wars. Cambridge University Press, 1992.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিBarkan, Elazar. Retreat of Scientific Racism: Changing Concepts of Race in Britain and the United States Between the World Wars. Cambridge University Press, 1992.
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