Não informado. (1981). Journal of Education for Teaching. Carfax Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Education for Teaching. Oxfordshire, Inglaterra: Carfax Publishing, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Education for Teaching. Carfax Publishing, 1981.
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