APA引文

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.

MLA引文

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

警告：这些引文格式不一定是100％准确.