APA-referens (7:e uppl.)

Wilson, C. (1999). Profitable customers (2nd.). Kogan Page.

Chicago-referens (17:e uppl.)

Wilson, Charles. Profitable Customers. 2nd. New Delhi: Kogan Page, 1999.

MLA-referens (9:e uppl.)

Wilson, Charles. Profitable Customers. 2nd. Kogan Page, 1999.