Leo Jones. (1984). Ideas: Speaking and listening activities for upper-intermediate students ( Student's book ). Cambridge, UK: Cambridge Univ. Press.
シカゴスタイル引用形Leo Jones. Ideas: Speaking and Listening Activities for Upper-intermediate Students ( Student's Book ). Cambridge, UK: Cambridge Univ. Press, 1984.
MLA引用形式Leo Jones. Ideas: Speaking and Listening Activities for Upper-intermediate Students ( Student's Book ). Cambridge, UK: Cambridge Univ. Press, 1984.
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