Sales management : decision, strategies, and cases / Richard R. Still ; Edward W. Cundiff ; Norman A.P. Govoni. (1994). Englewood Cliffs, NJ: Prentice-Hall, c.
Sales management : decision, strategies, and cases / Richard R. Still ; Edward W. Cundiff ; Norman A.P. Govoni. 4th ed.. Englewood Cliffs, NJ: Prentice-Hall, c, 1994. Buku Wajib.