Não informado. (1969). Learning and Development. McGill University, Centre for Learning and Development.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Learning and Development. Montreal, Canada: McGill University, Centre for Learning and Development, 1969.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Learning and Development. McGill University, Centre for Learning and Development, 1969.
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