Gaya APA

Buttle, F. et al (2007). Customer Relationship Management (Concepts and Tools); Manajemen Hubungan Pelanggan (ed. 1). Malang: Bayumedia Publishing.

Gaya MLA

Buttle, Francis. et al. "Customer Relationship Management (Concepts and Tools); Manajemen Hubungan Pelanggan". ed. 1 Malang: Bayumedia Publishing, 2007. Text.