Barkan, E. (1992). Retreat of scientific racism: Changing concepts of race in Britain and the United States between the world wars. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBarkan, Elazar. Retreat of Scientific Racism: Changing Concepts of Race in Britain and the United States Between the World Wars. Cambridge University Press, 1992.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBarkan, 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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