Não informado. Social biology and human affairs. British Social Biology Council.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Social Biology and Human Affairs. London: British Social Biology Council.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Social Biology and Human Affairs. British Social Biology Council.
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