APA (7th ed.) Citation

O'Hara, J. (1935). Butterfield 8, a novel. Modern Library.

Chicago Style (17th ed.) Citation

O'Hara, John. Butterfield 8, a Novel. New York: Modern Library, 1935.

MLA (9th ed.) Citation

O'Hara, John. Butterfield 8, a Novel. Modern Library, 1935.