Walton, R. (2000). Initiative: A course for advanced learners. Cambridge, UK: Cambridge University Press.
シカゴスタイル引用形Walton, Richard. Initiative: A Course for Advanced Learners. Cambridge, UK: Cambridge University Press, 2000.
MLA引用形式Walton, Richard. Initiative: A Course for Advanced Learners. Cambridge, UK: Cambridge University Press, 2000.
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