Não informado. (1978). Journal of Sources in Educational History. Carfax Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Sources in Educational History. Oxford, Inglaterra: Carfax Publishing, 1978.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Sources in Educational History. Carfax Publishing, 1978.
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