Comfort, J. (1994). Speaking effectively: Developing speaking skills for business English. Cambridge: Cambridge University Press.
シカゴスタイル引用形Comfort, Jeremy. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge: Cambridge University Press, 1994.
MLA引用形式Comfort, Jeremy. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge: Cambridge University Press, 1994.
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