Latham-Koenig, C., & Oxenden, C. (2008). American English file 3 (online practice). New York: Oxford University.
Trích dẫn kiểu ChicagoLatham-Koenig, Christina, và Clive Oxenden. American English File 3 (online Practice). New York: Oxford University, 2008.
MLA引文Latham-Koenig, Christina, và Clive Oxenden. American English File 3 (online Practice). New York: Oxford University, 2008.
警告：这些引文格式不一定是100％准确.