APA-Zitierstil (7. Ausg.)

Sumner, W. G., & Keller, A. G. (1914). The challenge of facts: And other essays. Yale University Press; [etc., etc.].

Chicago-Zitierstil (17. Ausg.)

Sumner, William Graham, und Albert Galloway Keller. The Challenge of Facts: And Other Essays. New Haven: Yale University Press; [etc., etc.], 1914.

MLA-Zitierstil (8. Ausg.)

Sumner, William Graham, und Albert Galloway Keller. The Challenge of Facts: And Other Essays. Yale University Press; [etc., etc.], 1914.