APA (7th ed.) Citation

Krapp, G. P. (1960). The English language in America. Frederick Ungar Publishing.

Chicago Style (17th ed.) Citation

Krapp, George Philip. The English Language in America. New York: Frederick Ungar Publishing, 1960.

MLA (9th ed.) Citation

Krapp, George Philip. The English Language in America. Frederick Ungar Publishing, 1960.