APA (7th ed.) Citation

Engen, R. C., Breede, H. C., & English, A. (2020). Why We Fight: New Approaches to the Human Dimension of Warfare.

Chicago Style (17th ed.) Citation

Engen, Robert C., H. Christian Breede, and Allan English. Why We Fight: New Approaches to the Human Dimension of Warfare. 2020.

MLA (9th ed.) Citation

Engen, Robert C., et al. Why We Fight: New Approaches to the Human Dimension of Warfare. 2020.