SCHELLINCK, D. (1987). Marketing Research A Computer-assisted Approach / D.a. Schellinck And R.n. Maddox. The Dryden Press.
Lua i Stíl Chicago (17ú heag.)SCHELLINCK, D.A. Marketing Research A Computer-assisted Approach / D.a. Schellinck And R.n. Maddox. The Dryden Press, 1987.
Lua MLA (8ú heag.)SCHELLINCK, D.A. Marketing Research A Computer-assisted Approach / D.a. Schellinck And R.n. Maddox. The Dryden Press, 1987.
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