APA

Latham-Koenig C., Oxenden C., Seligson P. & Lambert J. (2013). American english file. New York: Oxford University Press.

Chicago

Latham-Koenig Christina, Oxenden Clive, Seligson Paul and Lambert Jerry. 2013. American english file. New York: Oxford University Press.

Harvard

Latham-Koenig C., Oxenden C., Seligson P. and Lambert J. (2013). American english file. New York: Oxford University Press.

MLA

Latham-Koenig Christina, Oxenden Clive, Seligson Paul and Lambert Jerry. American english file. New York: Oxford University Press. 2013.