Oxenden, C. (2010). American English file: Workbook starter with answer key. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoOxenden, Clive. American English File: Workbook Starter With Answer Key. Oxford: Oxford University Press, 2010.
MLA引文Oxenden, Clive. American English File: Workbook Starter With Answer Key. Oxford: Oxford University Press, 2010.
警告：这些引文格式不一定是100％准确.