Gaya APA

Buttle, F., Subiyanto, A. (2007). Customer Relationship Management (Manajemen Hubungan Pelanggan) Concepts And Tools . Malang: Banyumedia.

Gaya MLA

Buttle, Francis., Subiyanto, Arif. "Customer Relationship Management (Manajemen Hubungan Pelanggan) Concepts And Tools". Malang: Banyumedia, 2007. Text.