APA
belding s., . (2005). dealing with the customer from hell. london: kogan page.
Chicago
belding shaun, . 2005. dealing with the customer from hell. london: kogan page.
Harvard
belding s., . (2005). dealing with the customer from hell. london: kogan page.
MLA
belding shaun, . dealing with the customer from hell. london: kogan page. 2005.