RYAN CHRISTOPHER. (2002). HIGH PERFORMANCE INTERACTIVE MARKETING. VIVA BOOKS PVT.LTD.
Lua i Stíl Chicago (17ú heag.)RYAN CHRISTOPHER. HIGH PERFORMANCE INTERACTIVE MARKETING. MUMBAI: VIVA BOOKS PVT.LTD, 2002.
Lua MLA (9ú heag.)RYAN CHRISTOPHER. HIGH PERFORMANCE INTERACTIVE MARKETING. VIVA BOOKS PVT.LTD, 2002.
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