SILK ALVIN J. (2006). WHAT IS MARKETING. HARVARD BUSINESS SCHOOL PRESS.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSILK ALVIN J. WHAT IS MARKETING. BOSTON: HARVARD BUSINESS SCHOOL PRESS, 2006.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSILK ALVIN J. WHAT IS MARKETING. HARVARD BUSINESS SCHOOL PRESS, 2006.
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