APA (7th ed.) Citation

Lincoln, A., Cuomo, M. M., Holzer, H., & Boritt, G. S. (1990). Lincoln on democracy. HarperCollins.

Chicago Style (17th ed.) Citation

Lincoln, Abraham, Mario M. Cuomo, Harold Holzer, and G. S. Boritt. Lincoln on Democracy. New York, NY: HarperCollins, 1990.

MLA (9th ed.) Citation

Lincoln, Abraham, et al. Lincoln on Democracy. HarperCollins, 1990.