APA (7th ed.) Citation

Dupuy, R. E. (1939). World in arms: A study in military geography. The Military service publishing company.

Chicago Style (17th ed.) Citation

Dupuy, R. Ernest. World in Arms: A Study in Military Geography. Harrisburg, Pa.: The Military service publishing company, 1939.

MLA (9th ed.) Citation

Dupuy, R. Ernest. World in Arms: A Study in Military Geography. The Military service publishing company, 1939.