Cita APA (7a ed.)

Zikmund, W. (2004). Customer relationship management. John Wiley.

Cita Chicago Style (17a ed.)

Zikmund, William. Customer Relationship Management. Singapore: John Wiley, 2004.

Cita MLA (9a ed.)

Zikmund, William. Customer Relationship Management. John Wiley, 2004.