Não informado. (1971). International journal of continuing education and training. Baywood Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. International Journal of Continuing Education and Training. Farmingdale, NY: Baywood Publishing, 1971.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. International Journal of Continuing Education and Training. Baywood Publishing, 1971.
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