MLA

Nicholson, Margaret. A Dictionary of American-english Usage : Based On Fowler's Modern English Usage. New York: Oxford University Press, 1957.

APA

Nicholson, M. (1957). A dictionary of American-English usage : based on Fowler's Modern English usage. New York: Oxford University Press.

Chicago

Nicholson, Margaret. A Dictionary of American-English Usage: Based On Fowler's Modern English Usage. New York: Oxford University Press, 1957.