Calvin, R. J. (2007). Sales management demystified: A Self-Teaching Guide. New York, NY: McGraw-Hill.
Trích dẫn kiểu ChicagoCalvin, Robert J. Sales Management Demystified: A Self-Teaching Guide. New York, NY: McGraw-Hill, 2007.
MLA CitationCalvin, Robert J. Sales Management Demystified: A Self-Teaching Guide. New York, NY: McGraw-Hill, 2007.
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