Não informado. Social biology and human affairs. British Social Biology Council.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Social Biology and Human Affairs. London: British Social Biology Council.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Social Biology and Human Affairs. British Social Biology Council.
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