Oxenden, C., & Koenig, C. L. (2001). English file: Upper-Intermediate workbook. Oxford: Oxford Univ. Press.
シカゴスタイル引用形Oxenden, Clive, , Christina Latham Koenig. English File: Upper-Intermediate Workbook. Oxford: Oxford Univ. Press, 2001.
MLA引用形式Oxenden, Clive, , Christina Latham Koenig. English File: Upper-Intermediate Workbook. Oxford: Oxford Univ. Press, 2001.
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