Rugman, A. M. (2006). International Business ed. 4th. Pearson Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Rugman, Alan M. International Business Ed. 4th. Pearson Prentice-Hall, 2006.
Lua MLA (8ú heag.)Rugman, Alan M. International Business Ed. 4th. Pearson Prentice-Hall, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.