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.
Deismireacht MLAOxenden, Clive. American English File: Workbook Starter With Answer Key. Oxford: Oxford University Press, 2010.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.