APA (7th ed.) Citation

Krapp, G. P. (1919). The pronunciation of standard English in America. Oxford university press, American branch.

Chicago Style (17th ed.) Citation

Krapp, George Philip. The Pronunciation of Standard English in America. New York [etc.]: Oxford university press, American branch, 1919.

MLA (9th ed.) Citation

Krapp, George Philip. The Pronunciation of Standard English in America. Oxford university press, American branch, 1919.