Gaya APA
Barnes, J, G. (2003).
Secrets of Customer Relationship Management (Rahasia Manajemen Hubungan Pelanggan) (II).
Yogyakarta:
ANDI.
Gaya MLA
Barnes, James, G.
"Secrets of Customer Relationship Management (Rahasia Manajemen Hubungan Pelanggan)".
II
Yogyakarta:
ANDI,
2003.
Textbook.