Butterfield, J. (2007). Oxford A-Z of English usage. Oxford University Press.
Chicagoスタイル(17版)引用形式Butterfield, Jeremy. Oxford A-Z of English Usage. Oxford: Oxford University Press, 2007.
MLA(9版)引用形式Butterfield, Jeremy. Oxford A-Z of English Usage. Oxford University Press, 2007.
警告: この引用は必ずしも正確ではありません.