APA aipamena

Koenig, C. L., & Oxenden, C. (2013). American English file: Online practice. Oxford: Oxford University Press.

Chicago Style aipamena

Koenig, Chistina Latham, và Clive Oxenden. American English File: Online Practice. Oxford: Oxford University Press, 2013.

MLA aipamena

Koenig, Chistina Latham, và Clive Oxenden. American English File: Online Practice. Oxford: Oxford University Press, 2013.

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