Cita APA (7a ed.)

Churchill, W., Czernin, H., & Zell, C. (1928). Die Weltkrisis 1916/18. Amalthea-Verlag.

Cita Chicago Style (17a ed.)

Churchill, Winston, Hans Czernin, y Carl Zell. Die Weltkrisis 1916/18. Zürich: Amalthea-Verlag, 1928.

Cita MLA (9a ed.)

Churchill, Winston, et al. Die Weltkrisis 1916/18. Amalthea-Verlag, 1928.