Manning, G. L., & Reece, B. L. (2001). Selling today: Building quality partnerships (8th ed.). Prentice Hall ; Pearson Education.

Manning, Gerald L., and Barry L. Reece. Selling Today: Building Quality Partnerships. 8th ed. Upper Saddle River, New Jersey : New Delhi: Prentice Hall ; Pearson Education, 2001.

Manning, Gerald L., and Barry L. Reece. Selling Today: Building Quality Partnerships. 8th ed. Prentice Hall ; Pearson Education, 2001.