Não informado. (1976). Journal of Classroom Interaction. American University, School of Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Classroom Interaction. Washington: American University, School of Education, 1976.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Classroom Interaction. American University, School of Education, 1976.
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