Hanan, M. (2004). Consultative selling: The Hanan formula for high-margin sales at high levels (7th ed.). AMACOM.
Chicago-Zitierstil (17. Ausg.)Hanan, Mack. Consultative Selling: The Hanan Formula for High-margin Sales at High Levels. 7th ed. New York: AMACOM, 2004.
MLA-Zitierstil (9. Ausg.)Hanan, Mack. Consultative Selling: The Hanan Formula for High-margin Sales at High Levels. 7th ed. AMACOM, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.