Anderson, D. (2007). How to deal with difficult customers: 10 simple strategies for selling to the stubborn, obnoxious, and belligerent. Wiley.
Chicago-Zitierstil (17. Ausg.)Anderson, Dave. How to Deal with Difficult Customers: 10 Simple Strategies for Selling to the Stubborn, Obnoxious, and Belligerent. Hoboken, N.J: Wiley, 2007.
MLA-Zitierstil (9. Ausg.)Anderson, Dave. How to Deal with Difficult Customers: 10 Simple Strategies for Selling to the Stubborn, Obnoxious, and Belligerent. Wiley, 2007.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.