APA (7th ed.) Citation

Wells, H. G. (1921). The outline of history: Being a plain history of life and mankind. Macmillan.

Chicago Style (17th ed.) Citation

Wells, Herbert George. The Outline of History: Being a Plain History of Life and Mankind. New York: Macmillan, 1921.

MLA (9th ed.) Citation

Wells, Herbert George. The Outline of History: Being a Plain History of Life and Mankind. Macmillan, 1921.