Oxenden, C., & Koenig, C. L. (1999). English file: Intermediate student's book. Oxford: Oxford Univ. Press.
Trích dẫn kiểu ChicagoOxenden, Clive, và Christina Latham Koenig. English File: Intermediate Student's Book. Oxford: Oxford Univ. Press, 1999.
MLA引文Oxenden, Clive, và Christina Latham Koenig. English File: Intermediate Student's Book. Oxford: Oxford Univ. Press, 1999.
警告:这些引文格式不一定是100%准确.