Não informado. (1937). Harvard Educational Review. Harvard University, Graduate School of Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Harvard Educational Review. Cambridge, Mass: Harvard University, Graduate School of Education, 1937.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Harvard Educational Review. Harvard University, Graduate School of Education, 1937.
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