Não informado. (1960). International Bibliography of the Social Sciences. Unesco, International Committee for Social Sciences Documentation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. International Bibliography of the Social Sciences. Paris: Unesco, International Committee for Social Sciences Documentation, 1960.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. International Bibliography of the Social Sciences. Unesco, International Committee for Social Sciences Documentation, 1960.
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