PDF
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Frankwick, Gary L., Stephen S. Porter, and Lawrence A. Crosby (2001), “Dynamics of
Relationship Selling: A Longitudinal Examination of Changes in Salesperson-Customer
Relationship Status,” Journal of Personal Selling and Sales Management (Spring), 135-146.
with Joshua L. Wiener, and Gary L. Frankwick (2003), “The Moderating Effect of Selling
Situation …
https://www.wichita.edu/academics/business/marketing/_documents/VITAPorter_new.pdf