Walker, O. C. &. M. (2014). Marketing Strategy: A Decision focused approach. TMH.
Lua i Stíl Chicago (17ú heag.)Walker, Orville C. & Mullins. Marketing Strategy: A Decision Focused Approach. New Delhi: TMH, 2014.
Lua MLA (9ú heag.)Walker, Orville C. & Mullins. Marketing Strategy: A Decision Focused Approach. TMH, 2014.
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