Gaya APA

BUTTLE, F. (2004). Customer Relationship Management ; (Manajemen Hubungan Pelanggan) : Concepts and Tools (Ed. 1). MALANG: BAYUMEDIA.

Gaya MLA

BUTTLE, FRANCIS. "Customer Relationship Management ; (Manajemen Hubungan Pelanggan) : Concepts and Tools". Ed. 1 MALANG: BAYUMEDIA, 2004. Text.