Richards, J., & Long, M. (1988). Breakthrough: A Course in English Communication Practice. London: Oxford University Press.
シカゴスタイル引用形Richards, J.C., , M.n Long. Breakthrough: A Course in English Communication Practice. London: Oxford University Press, 1988.
MLA引用形式Richards, J.C., , M.n Long. Breakthrough: A Course in English Communication Practice. London: Oxford University Press, 1988.
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