APA (7th ed.) Citation

ProQuest (Firm), Holzer, H., & Gabbard, S. V. (2013). 1863: Lincoln's pivotal year. Southern Illinois University.

Chicago Style (17th ed.) Citation

ProQuest (Firm), Harold Holzer, and Sara Vaughn Gabbard. 1863: Lincoln's Pivotal Year. Carbondale: Southern Illinois University, 2013.

MLA (9th ed.) Citation

ProQuest (Firm), et al. 1863: Lincoln's Pivotal Year. Southern Illinois University, 2013.