Gaya APA
G.Barnes, J. (2007).
Secrets Of Customer Relationship Management (Rahasia Manajemen Hubungan Pelanggan) .
Yogyakarta:
Andi.
Gaya MLA
G.Barnes, James.
"Secrets Of Customer Relationship Management (Rahasia Manajemen Hubungan Pelanggan)".
Yogyakarta:
Andi,
2007.
Computer File.