Soars, J. (1991). Headway Pre-intermediate: Teacher's book. Oxford: Oxford University Press.
シカゴスタイル引用形Soars, John. Headway Pre-intermediate: Teacher's Book. Oxford: Oxford University Press, 1991.
MLA引用形式Soars, John. Headway Pre-intermediate: Teacher's Book. Oxford: Oxford University Press, 1991.
警告: この引用は必ずしも正確ではありません.