BURN, A. C. Marketing research#Alvin C. Burn, Ronald F. Bush. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)BURN, Alvin C. Marketing Research#Alvin C. Burn, Ronald F. Bush. Prentice Hall.
Lua MLA (8ú heag.)BURN, Alvin C. Marketing Research#Alvin C. Burn, Ronald F. Bush. Prentice Hall.
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