Barney, J. B. (2011). Gaining and sustaining competitive advantage (4th ed.). Pearson.
Lua i Stíl Chicago (17ú heag.)Barney, Jay B. Gaining and Sustaining Competitive Advantage. 4th ed. Upper Saddle River, NJ: Pearson, 2011.
Lua MLA (8ú heag.)Barney, Jay B. Gaining and Sustaining Competitive Advantage. 4th ed. Pearson, 2011.
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