BOLT GORDON. (2002). MARKET AND SALES FORECASTING. CREST PUBLISHING HOUSE.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBOLT GORDON. MARKET AND SALES FORECASTING. NEW DELHI: CREST PUBLISHING HOUSE, 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBOLT GORDON. MARKET AND SALES FORECASTING. CREST PUBLISHING HOUSE, 2002.
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