APA (7th ed.) Citation

Turner, J. G., Turner, L. L., & Lincoln, M. T. (1972). Mary Todd Lincoln: Her life and letters. Knopf.

Chicago Style (17th ed.) Citation

Turner, Justin G., Linda Levitt Turner, and Mary Todd Lincoln. Mary Todd Lincoln: Her Life and Letters. New York: Knopf, 1972.

MLA (9th ed.) Citation

Turner, Justin G., et al. Mary Todd Lincoln: Her Life and Letters. Knopf, 1972.