Marckwardt, A. H. (1958). American English. Oxford University Press.
Chicagoスタイル(17版)引用形式Marckwardt, Albert Henry. American English. New York: Oxford University Press, 1958.
MLA(9版)引用形式Marckwardt, Albert Henry. American English. Oxford University Press, 1958.
警告: この引用は必ずしも正確ではありません.