Παραπομπή APA

Karr, R., & Blohowiak, D. (1998). The complete idiot's guide to great customer service. PHI.

Παραπομπή Chicago Style

Karr, Ron, και Don Blohowiak. The Complete Idiot's Guide to Great Customer Service. New Delhi: PHI, 1998.

Παραπομπή MLA

Karr, Ron, και Don Blohowiak. The Complete Idiot's Guide to Great Customer Service. PHI, 1998.