Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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