APA (7th ed.) Citation

Nicolai, G. F., Grande, C. A., & Grande, J. (1918). The biology of war. The Century.

Chicago Style (17th ed.) Citation

Nicolai, Georg Friedrich, Constance Alice Grande, and Julian Grande. The Biology of War. New York: The Century, 1918.

MLA (9th ed.) Citation

Nicolai, Georg Friedrich, et al. The Biology of War. The Century, 1918.