(1981). Basic skills in English: Yellow level. New York: Mc Dougal, Littel & Company.
シカゴスタイル引用形Basic Skills in English: Yellow Level. New York: Mc Dougal, Littel & Company, 1981.
MLA引用形式Basic Skills in English: Yellow Level. New York: Mc Dougal, Littel & Company, 1981.
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