APA (7th ed.) Citation

Henry, O. (1920). The four million. Doubleday, Page & Co..

Chicago Style (17th ed.) Citation

Henry, O. The Four Million. Garden City, N.Y.: Doubleday, Page & Co., 1920.

MLA (9th ed.) Citation

Henry, O. The Four Million. Doubleday, Page & Co., 1920.