Belding, S. (2005). Dealing with the Customer from Hell. Kogan Page.
Cita Chicago (17th ed.)Belding, Shaun. Dealing with the Customer from Hell. London: Kogan Page, 2005.
Cita MLA (9th ed.)Belding, Shaun. Dealing with the Customer from Hell. Kogan Page, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.