Craven, R. (2002). Customer is king: How to exceed their expectations. Virgin Books.
Chicago-Zitierstil (17. Ausg.)Craven, Robert. Customer Is King: How to Exceed Their Expectations. London: Virgin Books, 2002.
MLA-Zitierstil (9. Ausg.)Craven, Robert. Customer Is King: How to Exceed Their Expectations. Virgin Books, 2002.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.