Não informado. (1950). Educational Researcher. American Educational Research Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Educational Researcher. Washington: American Educational Research Association, 1950.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Educational Researcher. American Educational Research Association, 1950.
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