Παραπομπή APA

Denton, D. K. (1992). How to give quality service to your customers. Universal book stall.

Παραπομπή Chicago Style

Denton, D. Keith. How to Give Quality Service to Your Customers. New Delhi: Universal book stall, 1992.

Παραπομπή MLA

Denton, D. Keith. How to Give Quality Service to Your Customers. Universal book stall, 1992.