Harvey, C. (1992). Successful selling in a week. Headway - Hodder & Stoughton.
Chicago Style (17. basım) AtıfHarvey, C. Successful Selling in a Week. London: Headway - Hodder & Stoughton, 1992.
MLA (9th ed.) AtıfHarvey, C. Successful Selling in a Week. Headway - Hodder & Stoughton, 1992.
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