Dyfyniad APA

Oxenden, C., & Koenig, C. L. (2001). English file: Upper-Intermediate workbook. Oxford: Oxford Univ. Press.

Dyfyniad Arddull Chicago

Oxenden, Clive, và Christina Latham Koenig. English File: Upper-Intermediate Workbook. Oxford: Oxford Univ. Press, 2001.

Dyfyniad MLA

Oxenden, Clive, và Christina Latham Koenig. English File: Upper-Intermediate Workbook. Oxford: Oxford Univ. Press, 2001.

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