AAKER, D. A. (1990). Marketing Research David A. Aaker And George S. Day. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)AAKER, David A. Marketing Research David A. Aaker And George S. Day. John Wiley & Sons, 1990.
Lua MLA (8ú heag.)AAKER, David A. Marketing Research David A. Aaker And George S. Day. John Wiley & Sons, 1990.
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