Cita APA (7th ed.)

Peelen, E. (2005). Customer relationship management. Prentice Hall.

Cita Chicago (17th ed.)

Peelen, Ed. Customer Relationship Management. Harlow, England: Prentice Hall, 2005.

Cita MLA (9th ed.)

Peelen, Ed. Customer Relationship Management. Prentice Hall, 2005.