APA (7th ed.) Citation

Langsam, W. C. (1940). The world since 1914 (4. ed.). Macmillan.

Chicago Style (17th ed.) Citation

Langsam, Walter Consuelo. The World Since 1914. 4. ed. New York: Macmillan, 1940.

MLA (9th ed.) Citation

Langsam, Walter Consuelo. The World Since 1914. 4. ed. Macmillan, 1940.