(2000). New headway English course: Pre-Intermediate, Workbook with key. Oxford: Oxford University Press.
シカゴスタイル引用形New Headway English Course: Pre-Intermediate, Workbook With Key. Oxford: Oxford University Press, 2000.
MLA引用形式New Headway English Course: Pre-Intermediate, Workbook With Key. Oxford: Oxford University Press, 2000.
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