Não informado. (1957). Business Horizons. Indiana University, School of Business.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Business Horizons. Bloomington, Ind: Indiana University, School of Business, 1957.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Business Horizons. Indiana University, School of Business, 1957.
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