Koenig, C. L., & Oxenden, C. (2013). American English file: Teacher's book. Oxford: Oxford University Press.
استشهاد بنمط شيكاغوKoenig, Chistina Latham, و Clive Oxenden. American English File: Teacher's Book. Oxford: Oxford University Press, 2013.
MLA استشهادKoenig, Chistina Latham, و Clive Oxenden. American English File: Teacher's Book. Oxford: Oxford University Press, 2013.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.