RYAN CHRISTOPHER. (2002). HIGH PERFORMANCE INTERACTIVE MARKETING. VIVA BOOKS PVT.LTD.
Čikaški stil citiranja (17. izdanje)RYAN CHRISTOPHER. HIGH PERFORMANCE INTERACTIVE MARKETING. MUMBAI: VIVA BOOKS PVT.LTD, 2002.
MLA način citiranja (9. izdanje)RYAN CHRISTOPHER. HIGH PERFORMANCE INTERACTIVE MARKETING. VIVA BOOKS PVT.LTD, 2002.
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