APA (7th ed.) Citation

Langer, W. L. (1951). The diplomacy of imperialism, 1890-1902 / by W.L. Langer (2nd ed.). Knopf.

Chicago Style (17th ed.) Citation

Langer, W. L. The Diplomacy of Imperialism, 1890-1902 / by W.L. Langer. 2nd ed. Knopf, 1951.

MLA (9th ed.) Citation

Langer, W. L. The Diplomacy of Imperialism, 1890-1902 / by W.L. Langer. 2nd ed. Knopf, 1951.

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