Gaya APA
Barnes, J, G. (2003).
Secrets of customer relationship management : Rahasia Manajemen hubungan pelanggan (II).
Yogyakarta:
Andi Offset.
Gaya MLA
Barnes, James, G..
"Secrets of customer relationship management : Rahasia Manajemen hubungan pelanggan".
II
Yogyakarta:
Andi Offset,
2003.
Text.