Richards, J. C. (1998). Changes: English for international communication : INTRO teacher's book. Cambridge University Press.
シカゴスタイル引用形Richards, Jack C. Changes: English for International Communication : INTRO Teacher's Book. Cambridge University Press, 1998.
MLA引用形式Richards, Jack C. Changes: English for International Communication : INTRO Teacher's Book. Cambridge University Press, 1998.
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