Tohutoro APA (7th ed.)

Peelen, E. (2005). Customer relationship management. Pearson.

Tohutoru Kātū Chicago (17th ed.)

Peelen, Ed. Customer Relationship Management. New Delhi: Pearson, 2005.

Tohutoro MLA (9th ed.)

Peelen, Ed. Customer Relationship Management. Pearson, 2005.