Leo Jones. (2001). New progress to proficiency (student's book). Cambridge: Cambridge Univ. Press.
シカゴスタイル引用形Leo Jones. New Progress to Proficiency (student's Book). Cambridge: Cambridge Univ. Press, 2001.
MLA引用形式Leo Jones. New Progress to Proficiency (student's Book). Cambridge: Cambridge Univ. Press, 2001.
警告: この引用は必ずしも正確ではありません.