APA (7th ed.) Citation

Sumner, C. (1849). The war system of the commonwealth of nations: Mr. Sumner's address before the American Peace Society (2d ed.).

Chicago Style (17th ed.) Citation

Sumner, Charles. The War System of the Commonwealth of Nations: Mr. Sumner's Address Before the American Peace Society. 2d ed. [Boston, 1849.

MLA (8th ed.) Citation

Sumner, Charles. The War System of the Commonwealth of Nations: Mr. Sumner's Address Before the American Peace Society. 2d ed. 1849.