Não informado. (1987). National Business Education Yearbook. National Business Education Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. National Business Education Yearbook. Reston, Va: National Business Education Association, 1987.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. National Business Education Yearbook. National Business Education Association, 1987.
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