Gaya APA
Buttle, F. (2007).
CUSTOMER RELATIONSHIP MANAGEMENT : CONCEPTS AND TOOLS ( MANAJEMEN HUBUNGAN PELANGGAN ) .
Jakarta:
Bayumedia Publishing.
Gaya MLA
Buttle, Francis.
"CUSTOMER RELATIONSHIP MANAGEMENT : CONCEPTS AND TOOLS ( MANAJEMEN HUBUNGAN PELANGGAN )".
Jakarta:
Bayumedia Publishing,
2007.
Buku Inti.