Oxenden, C. (1997). English file: Workbook. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoOxenden, Clive. English File: Workbook. Oxford: Oxford University Press, 1997.
MLA引文Oxenden, Clive. English File: Workbook. Oxford: Oxford University Press, 1997.
警告：這些引文格式不一定是100％准確.