Cita APA (7th ed.)

Oxenden, C., Latham-Koenig, C., & Seligson, P. (2008). American English file. Oxford University Press.

Cita Chicago (17th ed.)

Oxenden, Clive, Christina Latham-Koenig, i Paul Seligson. American English File. New York,USA ; Oxford, United Kingdom: Oxford University Press, 2008.

Cita MLA (9th ed.)

Oxenden, Clive, et al. American English File. Oxford University Press, 2008.