Metcalf, R., & Rob Metcalf; Chris Cavey; Alison Greenwood. (2011). English unlimited. B2, Upper Intermediate Self-study Pack. Cambridge: Cambridge University Press.
シカゴスタイル引用形Metcalf, Rob, , Rob Metcalf; Chris Cavey; Alison Greenwood. English Unlimited. B2, Upper Intermediate Self-study Pack. Cambridge: Cambridge University Press, 2011.
MLA引用形式Metcalf, Rob, , Rob Metcalf; Chris Cavey; Alison Greenwood. English Unlimited. B2, Upper Intermediate Self-study Pack. Cambridge: Cambridge University Press, 2011.
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