Gaya APA

Barnes, J, G., Winardi, A. (2009). Secret of Customer Relationship Management : Rahasia Manajemen Hubungan Pelanggan . Yogyakarta: Andi.

Gaya MLA

Barnes, James, G.., Winardi, Andreas. "Secret of Customer Relationship Management : Rahasia Manajemen Hubungan Pelanggan". Yogyakarta: Andi, 2009. Text.