CHURCHILL, G. A. (1995). Marketing Research: Methodological Foundations / Gilbert A. Churchill. The Dryden Press.
Lua i Stíl Chicago (17ú heag.)CHURCHILL, Gilbert A. Marketing Research: Methodological Foundations / Gilbert A. Churchill. The Dryden Press, 1995.
Lua MLA (8ú heag.)CHURCHILL, Gilbert A. Marketing Research: Methodological Foundations / Gilbert A. Churchill. The Dryden Press, 1995.
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