(1912). Problems in eugenics. The Eugenics Education Society.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रProblems in Eugenics. Adelphi: The Eugenics Education Society, 1912.
एमएलए (8वां संस्करण) प्रशस्ति पत्रProblems in Eugenics. The Eugenics Education Society, 1912.
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