HASKINS, J. (1991). Succesful Advertising Research Methods Jack Haskins & Alice Kendrick. NTC Busines Books.
Lua i Stíl Chicago (17ú heag.)HASKINS, Jack. Succesful Advertising Research Methods Jack Haskins & Alice Kendrick. NTC Busines Books, 1991.
Lua MLA (8ú heag.)HASKINS, Jack. Succesful Advertising Research Methods Jack Haskins & Alice Kendrick. NTC Busines Books, 1991.
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