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Aaker, David, Kumar, George S Day. (2000). Marketing Research: Ed. 7 (Ed. 7). Amerika: John Wiley.

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Aaker, David, Kumar, George S Day. Marketing Research: Ed. 7. Ed. 7 Amerika: John Wiley, 2000. Text.

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Aaker, David, Kumar, George S Day. Marketing Research: Ed. 7. Ed. 7 Amerika: John Wiley, 2000. Text.

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Aaker, David, Kumar, George S Day. Marketing Research: Ed. 7. Ed. 7 Amerika: John Wiley, 2000. Print.