Hadfield, J., & Hadfield, C. (1999). Simple speaking activities. Oxford: Oxford University Press.
シカゴスタイル引用形Hadfield, Jill, , Charles Hadfield. Simple Speaking Activities. Oxford: Oxford University Press, 1999.
MLA引用形式Hadfield, Jill, , Charles Hadfield. Simple Speaking Activities. 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.