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Edwin K. Simpson
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The Selling Cycle: A Unifying Guide for Sales Management Decisions
T. Wotruba, Edwin K. Simpson, 2015 .
A Scale for Source Credibility; Validated in the Selling Context
Edwin K. Simpson, Ruel C. Kahler, 2013 .
Leaders in Selling and Sales Management: The National Account Marketing Association: Turning Silver into Gold
Edwin K. Simpson, 2013 .