Gaya APA
buttle, F. (2007).
Customer Relationship Management (Manajemen Hubungan Pelanggan) .
Jakarta:
bayu media publishing.
Gaya MLA
buttle, Francis.
"Customer Relationship Management (Manajemen Hubungan Pelanggan)".
Jakarta:
bayu media publishing,
2007.
Administrasi Niaga.