Koenig, C. L., Oxenden, C., & Seligson, P. (2013). American English file: Teacher's book. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoKoenig, Chistina Latham, Clive Oxenden, và Paul Seligson. American English File: Teacher's Book. Oxford: Oxford University Press, 2013.
MLA CitationKoenig, Chistina Latham, Clive Oxenden, và Paul Seligson. American English File: Teacher's Book. Oxford: Oxford University Press, 2013.
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