Gaya APA

Buttle, F., Subiyanto, A. (2007). Customer Relationship Management ( Manajemen Hubungan Pelanggan) (Ed. 1). Jakarta: Bayumedia Publishing.

Gaya MLA

Buttle, Francis., Subiyanto, Arief. "Customer Relationship Management ( Manajemen Hubungan Pelanggan)". Ed. 1 Jakarta: Bayumedia Publishing, 2007. Text.