May, P. (1999). Knockout first certificate: Student's book (5th ed.). Oxford: Oxford University Press.
シカゴスタイル引用形May, Peter. Knockout First Certificate: Student's Book. 5th ed. Oxford: Oxford University Press, 1999.
MLA引用形式May, Peter. Knockout First Certificate: Student's Book. 5th ed. Oxford: Oxford University Press, 1999.
警告: この引用は必ずしも正確ではありません.