ebrary, Inc. (2006). Customer loyalty, retention, and customer relationship management. Emerald Group Publishing.
Chicago-Zitierstil (17. Ausg.)ebrary, Inc. Customer Loyalty, Retention, and Customer Relationship Management. Bradford, England: Emerald Group Publishing, 2006.
MLA-Zitierstil (9. Ausg.)ebrary, Inc. Customer Loyalty, Retention, and Customer Relationship Management. Emerald Group Publishing, 2006.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.