1. Get the Most Out of Your Salesforce;Newton;Harvard Business Review,1969
2. How to Pay Your Salesforce;Steinbrink;Harvard Business Review,1978
3. A Sales Compensation Plan for Maximum Motivation;Winer;Industrial Marketing Management,1976
4. The Motivation to Work;Hertzberg,1959
5. Haas, R., Industrial Marketing Management. Petrocelli/Chart, New York, p. 181.