Não informado. (1928). Journal of Education for Business. Heldref Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Education for Business. Washington: Heldref Publications, 1928.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Education for Business. Heldref Publications, 1928.
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