Citazione APA

Karr, R., & Blohowiak, D. (1998). Complete idiot's guide to great customer service (1st.). Prentice-Hall..

Stile di citazione Chicago

Karr, Ron, e Don Blohowiak. Complete Idiot's Guide to Great Customer Service. 1st. N,Delhi: Prentice-Hall., 1998.

Citazione MLA

Karr, Ron, e Don Blohowiak. Complete Idiot's Guide to Great Customer Service. 1st. Prentice-Hall., 1998.