Gaya APA

Buttle, F. (2004). Customer Relationship Management : Manajemen Hubungan Pelanggan (Concepts and Tools) (ed.1). Malang: Bayumedia Publishing.

Gaya MLA

Buttle, Francis. "Customer Relationship Management : Manajemen Hubungan Pelanggan (Concepts and Tools)". ed.1 Malang: Bayumedia Publishing, 2004. Text.