APA ציטוט

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

Trích dẫn kiểu Chicago

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

ציטוט MLA

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