Oxenden, C. (2010). American English file: Workbook starter with answer key. Oxford: Oxford University Press.
استشهاد بنمط شيكاغوOxenden, Clive. American English File: Workbook Starter With Answer Key. Oxford: Oxford University Press, 2010.
MLA استشهادOxenden, Clive. American English File: Workbook Starter With Answer Key. Oxford: Oxford University Press, 2010.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.