WRENN, B. (1983). Instructor's Manual With Cases Principles Of Marketing Bruce Wrenn And Richard M. Clevett. Prentice HallInc.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWRENN, Bruce. Instructor's Manual With Cases Principles Of Marketing Bruce Wrenn And Richard M. Clevett. Prentice HallInc, 1983.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWRENN, Bruce. Instructor's Manual With Cases Principles Of Marketing Bruce Wrenn And Richard M. Clevett. Prentice HallInc, 1983.
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