(2013). Speak now: Communicate with confidence: Workbook 4. New York: Oxford University Press.
シカゴスタイル引用形Speak Now: Communicate With Confidence: Workbook 4. New York: Oxford University Press, 2013.
MLA引用形式Speak Now: Communicate With Confidence: Workbook 4. New York: Oxford University Press, 2013.
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