Hart, N. A., & Humphrey, G. (1990). The Professional adviser's guide to marketing. Mercury Books.
Chicago Style (17. basım) AtıfHart, Norman A., ve Geoff Humphrey. The Professional Adviser's Guide to Marketing. London: Mercury Books, 1990.
MLA (8th ed.) AtıfHart, Norman A., ve Geoff Humphrey. The Professional Adviser's Guide to Marketing. Mercury Books, 1990.
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