Gaya APA
Barners, J, G. (2003).
Secrets of Customer Relationship Management= Rahasia Manajemen Hubungan Pelanggan .
Yogyakarta:
Andi.
Gaya MLA
Barners, James, G..
"Secrets of Customer Relationship Management= Rahasia Manajemen Hubungan Pelanggan".
Yogyakarta:
Andi,
2003.
Text.