APA (7th ed.) Citation

Senior, N. W., & Sumner, C. (1856). American slavery. Longman.

Chicago Style (17th ed.) Citation

Senior, Nassau William, and Charles Sumner. American Slavery. London: Longman, 1856.

MLA (9th ed.) Citation

Senior, Nassau William, and Charles Sumner. American Slavery. Longman, 1856.

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