WALKER, o. C. (1992). Marketing Strategy Planning And Implementation / Orville C. Walker. Richard D. Irwin.
Lua i Stíl Chicago (17ú heag.)WALKER, orville C. Marketing Strategy Planning And Implementation / Orville C. Walker. Richard D. Irwin, 1992.
Lua MLA (8ú heag.)WALKER, orville C. Marketing Strategy Planning And Implementation / Orville C. Walker. Richard D. Irwin, 1992.
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