APA

Marckwardt A. H., Walcott F. G., Leonard S. A. & National Council of Teachers of English. (1938). Facts about current English usage. New York: D. Appleton-Century Company, incorporated.

Chicago

Marckwardt Albert Henry, Walcott Fred G, Leonard Sterling Andrus and National Council of Teachers of English. 1938. Facts about current English usage. New York: D. Appleton-Century Company, incorporated.

Harvard

Marckwardt A. H., Walcott F. G., Leonard S. A. and National Council of Teachers of English. (1938). Facts about current English usage. New York: D. Appleton-Century Company, incorporated.

MLA

Marckwardt Albert Henry, Walcott Fred G, Leonard Sterling Andrus and National Council of Teachers of English. Facts about current English usage. New York: D. Appleton-Century Company, incorporated. 1938.