Buttle, F. (2009). Customer relationship management: Concepts and technologies (2nd ed.). Routledge.
Chicago ZitierstilButtle, Francis. Customer Relationship Management: Concepts and Technologies. 2nd ed. New York: Routledge, 2009.
MLA ZitierstilButtle, Francis. Customer Relationship Management: Concepts and Technologies. 2nd ed. Routledge, 2009.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.