Walker, O. (2010). Marketing strategy: A decision-focused approach. New York: McGraw-Hill Education.
Čikaški stil citiranjaWalker, Orville. Marketing Strategy: A Decision-focused Approach. New York: McGraw-Hill Education, 2010.
MLA način citiranjaWalker, Orville. Marketing Strategy: A Decision-focused Approach. New York: McGraw-Hill Education, 2010.
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