Anderson, D. (2007). How to deal with difficult customers: 10 simple strategies for selling to the stubborn, obnoxious, and belligerent. John Wiley & Sons.
Παραπομπή Chicago StyleAnderson, Dave. How to Deal With Difficult Customers: 10 Simple Strategies for Selling to the Stubborn, Obnoxious, and Belligerent. John Wiley & Sons, 2007.
Παραπομπή MLAAnderson, Dave. How to Deal With Difficult Customers: 10 Simple Strategies for Selling to the Stubborn, Obnoxious, and Belligerent. John Wiley & Sons, 2007.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.