Gaya APA

Buttle, F. (2007). CUSTOMER RELATIONSHIP MANAGEMENT (MANAJEMEN HUBUNGAN LANGGANAN) (Ed.I/cet.3). New York: Butterworth - Heinemann.

Gaya MLA

Buttle, Francis. "CUSTOMER RELATIONSHIP MANAGEMENT (MANAJEMEN HUBUNGAN LANGGANAN)". Ed.I/cet.3 New York: Butterworth - Heinemann, 2007. Text.