COOPER SIMON. (1997). SELLING: PRINCIPLES, PRACTICE AND MANAGEMENT. PITMAN PUBLICATIONS.
Čikaški stil citiranja (17. izdanje)COOPER SIMON. SELLING: PRINCIPLES, PRACTICE AND MANAGEMENT. LONDON: PITMAN PUBLICATIONS, 1997.
MLA način citiranja (9. izdanje)COOPER SIMON. SELLING: PRINCIPLES, PRACTICE AND MANAGEMENT. PITMAN PUBLICATIONS, 1997.
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