Gaya APA

Buttle, F. et al (2007). Customer relationship management (manajemen hubungan pelanggan) : concepts and tools (Ed. 1). Malang: Bayumedia Publishing.

Gaya MLA

Buttle, Francis. et al. "Customer relationship management (manajemen hubungan pelanggan) : concepts and tools". Ed. 1 Malang: Bayumedia Publishing, 2007. Text.