Gaya APA
Buttle, F. (2007).
Customer Relationship Management ( Manajemen Hubungan Pelanggan) : Concepts and Tools (1).
Jakarta:
Bayumedia.
Gaya MLA
Buttle, Francis.
"Customer Relationship Management ( Manajemen Hubungan Pelanggan) : Concepts and Tools".
1
Jakarta:
Bayumedia,
2007.
Text.