Still, R. R., Cundiff, E. W., & Govoni, N. A. P. (1988). Sales management: Decisions, strategies, and cases (5th ed.). Prentice-Hall ; Prentice-Hall of India.

Still, Richard Ralph, Edward W. Cundiff, and Norman A. P. Govoni. Sales Management: Decisions, Strategies, and Cases. 5th ed. Englewood Cliffs, NJ : New Delhi: Prentice-Hall ; Prentice-Hall of India, 1988.

Still, Richard Ralph, et al. Sales Management: Decisions, Strategies, and Cases. 5th ed. Prentice-Hall ; Prentice-Hall of India, 1988.