Collier, M. (2011). The ultimate online customer service guide: How to connect with your customers to sell more! Wiley.
Chicago-Zitierstil (17. Ausg.)Collier, Marsha. The Ultimate Online Customer Service Guide: How to Connect with Your Customers to Sell More! Hoboken, N.J: Wiley, 2011.
MLA-Zitierstil (9. Ausg.)Collier, Marsha. The Ultimate Online Customer Service Guide: How to Connect with Your Customers to Sell More! Wiley, 2011.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.