Gaya APA

Barnes, J, G., Winardi, A. (2003). Secrets of Customer Relationship Management = Rahasia Manajemen Hubungan Pelanggan (II). Yogyakarta: Andi Yogyakarta.

Gaya MLA

Barnes, James, G.., Winardi, Andreas. "Secrets of Customer Relationship Management = Rahasia Manajemen Hubungan Pelanggan". II Yogyakarta: Andi Yogyakarta, 2003. Text.