APA (7th ed.) Citation

Langsam, W. C. (1954). The world since 1919 (7th ed. of The world since 1914.). Macmillan.

Chicago Style (17th ed.) Citation

Langsam, Walter Consuelo. The World Since 1919. 7th ed. of The world since 1914. New York: Macmillan, 1954.

MLA (8th ed.) Citation

Langsam, Walter Consuelo. The World Since 1919. 7th ed. of The world since 1914. Macmillan, 1954.