Walker, O. C. (2014). Marketing strategy a decision-focused approach 8th ed. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Walker, Orville C. Marketing Strategy a Decision-focused Approach 8th Ed. McGraw-Hill, 2014.
Lua MLA (8ú heag.)Walker, Orville C. Marketing Strategy a Decision-focused Approach 8th Ed. McGraw-Hill, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.