APA (7th ed.) Citation

O'Neill, H. C. (1920). A history of the war. T.C. & E.C. Jack.

Chicago Style (17th ed.) Citation

O'Neill, H. C. A History of the War. London: T.C. & E.C. Jack, 1920.

MLA (9th ed.) Citation

O'Neill, H. C. A History of the War. T.C. & E.C. Jack, 1920.