Gaya APA
Buttle, F. (2004).
Customer Relationship Management (Manajemen Hubungan Pelanggan): Concept and Tools .
Oxford:
Elsevier.
Gaya MLA
Buttle, Francis.
"Customer Relationship Management (Manajemen Hubungan Pelanggan): Concept and Tools".
Oxford:
Elsevier,
2004.
Text.