Oxenden, C. (2008). American English file: Workbook 1. Oxford: Oxford University.
Trích dẫn kiểu ChicagoOxenden, Clive. American English File: Workbook 1. Oxford: Oxford University, 2008.
MLA引文Oxenden, Clive. American English File: Workbook 1. Oxford: Oxford University, 2008.
警告：这些引文格式不一定是100％准确.