Gaya APA

sudira, M, B, O. et al (2004). Customer Relationship Management (Manajemen Hubungan Pelanggan) : Concepts And Tools . Amsterdam: Elsevier.

Gaya MLA

sudira, Made, Bambang, Oka. et al. "Customer Relationship Management (Manajemen Hubungan Pelanggan) : Concepts And Tools". Amsterdam: Elsevier, 2004. Text.