Não informado. (1989). Education Libraries Journal. University of London, Institute of Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Education Libraries Journal. London: University of London, Institute of Education, 1989.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Education Libraries Journal. University of London, Institute of Education, 1989.
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