APA (7th ed.) Citation

Ropp, T. (1962). War in the modern world (New, rev. ed.). Collier.

Chicago Style (17th ed.) Citation

Ropp, Theodore. War in the Modern World. New, rev. ed. New York: Collier, 1962.

MLA (8th ed.) Citation

Ropp, Theodore. War in the Modern World. New, rev. ed. Collier, 1962.