Robertson, D. H., & Bellenger, D. N. (1980). Sales management: Decision making for improved profitability. New York: Macmillan.
Trích dẫn kiểu ChicagoRobertson, Dan H., và Danny N. Bellenger. Sales Management: Decision Making for Improved Profitability. New York: Macmillan, 1980.
Deismireacht MLARobertson, Dan H., và Danny N. Bellenger. Sales Management: Decision Making for Improved Profitability. New York: Macmillan, 1980.
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