Kral, T. (2005). Discover America ( An integrated skills text for intermadiate / Advanced students of English as a foreign language ). Washington D.C: United States Department of State.
シカゴスタイル引用形Kral, Thomas. Discover America ( An Integrated Skills Text for Intermadiate / Advanced Students of English As a Foreign Language ). Washington D.C: United States Department of State, 2005.
MLA引用形式Kral, Thomas. Discover America ( An Integrated Skills Text for Intermadiate / Advanced Students of English As a Foreign Language ). Washington D.C: United States Department of State, 2005.
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