Não informado. (1991). Journal of the Learning Sciences. Lawrence Erlbaum Associates.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Learning Sciences. Mahwah, NJ: Lawrence Erlbaum Associates, 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Learning Sciences. Lawrence Erlbaum Associates, 1991.
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