Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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