Schoell, W. F. (1988). Marketing: Contemporary concepts and practices (3ª ed.). Allyn and Bacon.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSchoell, William F. Marketing: Contemporary Concepts and Practices. 3ª ed. Allyn and Bacon, 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSchoell, William F. Marketing: Contemporary Concepts and Practices. 3ª ed. Allyn and Bacon, 1988.
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