Não informado. (1979). American Journal of Education. University of Chicago Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. American Journal of Education. Chicago, Ill: University of Chicago Press, 1979.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. American Journal of Education. University of Chicago Press, 1979.
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