APA (7th ed.) Citation

Webster, D., Webster, F., & Sanborn, E. D. (1857). The private correspondence of Daniel Webster. Little, Brown.

Chicago Style (17th ed.) Citation

Webster, Daniel, Fletcher Webster, and Edwin David Sanborn. The Private Correspondence of Daniel Webster. Boston: Little, Brown, 1857.

MLA (9th ed.) Citation

Webster, Daniel, et al. The Private Correspondence of Daniel Webster. Little, Brown, 1857.