Craven, R. (2002). Customer is king: How to exceed their expectations. Virgin Books.
Čikaški stil citiranja (17. izdanje)Craven, Robert. Customer Is King: How to Exceed Their Expectations. London: Virgin Books, 2002.
MLA način citiranja (9. izdanje)Craven, Robert. Customer Is King: How to Exceed Their Expectations. Virgin Books, 2002.
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