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