APA (7th ed.) Citation

McKnight, G. H. (1969). English words and their background. Gordian Press.

Chicago Style (17th ed.) Citation

McKnight, George Harley. English Words and Their Background. New York: Gordian Press, 1969.

MLA (9th ed.) Citation

McKnight, George Harley. English Words and Their Background. Gordian Press, 1969.