Gaya APA

Barnes, J, G., Winardi, A. (2001). Secrets of customer relationship management : rahasia manajemen hubungan pelanggan (Ed. 1 & 2). Yogyakarta: Andi.

Gaya MLA

Barnes, James, G.., Winardi, Andreas. "Secrets of customer relationship management : rahasia manajemen hubungan pelanggan". Ed. 1 & 2 Yogyakarta: Andi, 2001. Text.