Gaya APA
Buttle, F. (2007).
Customer Relationship Management : Manajemen Hubungan Pelanggan (Edisi 1).
Malang:
Bayumedia Publishing.
Gaya MLA
Buttle, Francis.
"Customer Relationship Management : Manajemen Hubungan Pelanggan".
Edisi 1
Malang:
Bayumedia Publishing,
2007.
TEXT.