Patterson, A. R., & Alison Ramage Patterson. (2014). Unlock: Listening and speaking skills. Cambridge: Cambridge University Press.
シカゴスタイル引用形Patterson, Alison Ramage, , Alison Ramage Patterson. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.
MLA引用形式Patterson, Alison Ramage, , Alison Ramage Patterson. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.
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