APA (7th ed.) Citation

Seidlhofer, B. (2011). Understanding English as a lingua franca. Oxford University Press.

Chicago Style (17th ed.) Citation

Seidlhofer, Barbara. Understanding English as a Lingua Franca. Oxford: Oxford University Press, 2011.

MLA (8th ed.) Citation

Seidlhofer, Barbara. Understanding English as a Lingua Franca. Oxford University Press, 2011.