APA (7th ed.) Citation

Sumner, W. G., & Keller, A. G. (1913). War and other essays. Yale University Press.

Chicago Style (17th ed.) Citation

Sumner, William Graham, and Albert Galloway Keller. War and Other Essays. New Haven: Yale University Press, 1913.

MLA (9th ed.) Citation

Sumner, William Graham, and Albert Galloway Keller. War and Other Essays. Yale University Press, 1913.