Gaya APA

BUTTLE, F., MAKLAN, S. (2015). CUSTOMER RELATIONSHIP MANAGEMENT Concepts and technologies E-BOOK (eD. 3). New York: Routledge.

Gaya MLA

BUTTLE, FRANCIS., MAKLAN, STAN. "CUSTOMER RELATIONSHIP MANAGEMENT Concepts and technologies E-BOOK". eD. 3 New York: Routledge, 2015. Text.