Oxenden, C., Hamilton, G., & Latham-Koenig, C. (1999). English file: Intermediate workbook. New York: Oxford University Press.
Trích dẫn kiểu ChicagoOxenden, Clive., Gill Hamilton, và Christina Latham-Koenig. English File: Intermediate Workbook. New York: Oxford University Press, 1999.
MLA引文Oxenden, Clive., Gill Hamilton, và Christina Latham-Koenig. English File: Intermediate Workbook. New York: Oxford University Press, 1999.
警告：這些引文格式不一定是100％准確.