(1994). Headway: Elementary (Student's book). Oxford: Oxford University Press.
シカゴスタイル引用形Headway: Elementary (Student's Book). Oxford: Oxford University Press, 1994.
MLA引用形式Headway: Elementary (Student's Book). Oxford: Oxford University Press, 1994.
警告: この引用は必ずしも正確ではありません.