LEHMANN, D. R., & WINER, R. S. (1991). Analysis for marketing planning. Irwin.
Lua i Stíl Chicago (17ú heag.)LEHMANN, Donald R., agus Russell S. WINER. Analysis for Marketing Planning. Homewood: Irwin, 1991.
Lua MLA (9ú heag.)LEHMANN, Donald R., agus Russell S. WINER. Analysis for Marketing Planning. Irwin, 1991.
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