APA (7th ed.) Citation

Langer, W. L. (1965). The diplomacy of imperialism, 1890-1902 (2d ed.). Knopf.

Chicago Style (17th ed.) Citation

Langer, William L. The Diplomacy of Imperialism, 1890-1902. 2d ed. New York: Knopf, 1965.

MLA (9th ed.) Citation

Langer, William L. The Diplomacy of Imperialism, 1890-1902. 2d ed. Knopf, 1965.