Johns, T. (1994). Perfect customer care: All you need to get it right first time. Arrow, Random House.
Chicago-Zitierstil (17. Ausg.)Johns, Ted. Perfect Customer Care: All You Need to Get It Right First Time. London : UK: Arrow, Random House, 1994.
MLA-Zitierstil (8. Ausg.)Johns, Ted. Perfect Customer Care: All You Need to Get It Right First Time. Arrow, Random House, 1994.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.