Barringer, B. R., & Ireland, R. D. (2011). Entrepreneurship: Successfully launching new ventures (3rd ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Barringer, Bruce R., agus R. Duane Ireland. Entrepreneurship: Successfully Launching New Ventures. 3rd ed. Upper Saddle River, N.J.: Prentice Hall, 2011.
Lua MLA (8ú heag.)Barringer, Bruce R., agus R. Duane Ireland. Entrepreneurship: Successfully Launching New Ventures. 3rd ed. Prentice Hall, 2011.
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