ZIKMUND, W. G. (1994). Exploring marketing research. The Dryden Press.
Lua i Stíl Chicago (17ú heag.)ZIKMUND, William G. Exploring Marketing Research. Philadelphia: The Dryden Press, 1994.
Lua MLA (9ú heag.)ZIKMUND, William G. Exploring Marketing Research. The Dryden Press, 1994.
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