Gilbert A. Churchill, Jr., Neil M. Ford, and Orville C. Walker, Jr. Predicting a Salesperson’s Job Effort and Performance: Theoretical, Empirical, and Methodological Considerations, in Sales Management: New Developments from Behavioral and Decision Model Research, под редакцией Richard P. Bagozzi. Cambridge, MA: Marketing Science Institute, 1979. С. 3–39; Gordon T. Gray and Stacia Wert-Gray. Decision-Making Processes and Formation of Salespeople’s Expectancies, Instrumentalities, and Valences. Journal of Personal Selling & Sales Management 19 (лето 1999). С. 53–59.