Seidlhofer, B. (2011). Understanding English as a lingua franca. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Seidlhofer, Barbara. Understanding English as a Lingua Franca. Oxford: Oxford University Press, 2011.
Lua MLA (8ú heag.)Seidlhofer, Barbara. Understanding English as a Lingua Franca. Oxford University Press, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.