Não informado. (1968). Journal of Educational Administration and History. University of Leeds, Museum of Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Educational Administration and History. Leeds, Inglaterra: University of Leeds, Museum of Education, 1968.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Educational Administration and History. University of Leeds, Museum of Education, 1968.
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