APA

Krapp G. P., . (1925). The English language in America. New York: The Century Co., for the Modern Language Association of America.

Chicago

Krapp George Philip, . 1925. The English language in America. New York: The Century Co., for the Modern Language Association of America.

Harvard

Krapp G. P., . (1925). The English language in America. New York: The Century Co., for the Modern Language Association of America.

MLA

Krapp George Philip, . The English language in America. New York: The Century Co., for the Modern Language Association of America. 1925.