Greenberg, P. (2001). CRM at the speed of light: Capturing and keeping customers in internet real time. TMH.
Chicago-Zitierstil (17. Ausg.)Greenberg, Paul. CRM at the Speed of Light: Capturing and Keeping Customers in Internet Real Time. New delhi: TMH, 2001.
MLA-Zitierstil (9. Ausg.)Greenberg, Paul. CRM at the Speed of Light: Capturing and Keeping Customers in Internet Real Time. TMH, 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.