APA (7th ed.) Citation

Adams, H., Hay, J., & King, C. (1880). Democracy: An American novel. H. Holt.

Chicago Style (17th ed.) Citation

Adams, Henry, John Hay, and Clarence King. Democracy: An American Novel. New York: H. Holt, 1880.

MLA (9th ed.) Citation

Adams, Henry, et al. Democracy: An American Novel. H. Holt, 1880.