Cita APA (7a ed.)

Langer, W. L. (1951). The diplomacy of imperialism, 1890-1902 (2nd ed. with supplementary bibliographies.). Alfred A. Knopf.

Cita Chicago Style (17a ed.)

Langer, William L. The Diplomacy of Imperialism, 1890-1902. 2nd ed. with supplementary bibliographies. New York: Alfred A. Knopf, 1951.

Cita MLA (9a ed.)

Langer, William L. The Diplomacy of Imperialism, 1890-1902. 2nd ed. with supplementary bibliographies. Alfred A. Knopf, 1951.