APA (7th ed.) Citation

Richter, D. C. (1994). Chemical soldiers: British gas warfare in World War I. Leo Cooper.

Chicago Style (17th ed.) Citation

Richter, Donald C. Chemical Soldiers: British Gas Warfare in World War I. London: Leo Cooper, 1994.

MLA (9th ed.) Citation

Richter, Donald C. Chemical Soldiers: British Gas Warfare in World War I. Leo Cooper, 1994.

Warning: These citations may not always be 100% accurate.