APA-viite

Denton, D. K. (1990). How to give quality service to your customers. Universal.

Chicago-tyylinen lähdeviittaus

Denton, D. Keith. How to Give Quality Service to Your Customers. New Delhi: Universal, 1990.

MLA-viite

Denton, D. Keith. How to Give Quality Service to Your Customers. Universal, 1990.