APA (7th ed.) Citation

Beard, J. A., & Makowicki, S. D. (2020). The Lincoln assassination. Center of Military History, United States Army.

Chicago Style (17th ed.) Citation

Beard, Joseph A., and Shane D. Makowicki. The Lincoln Assassination. Washington, D.C.: Center of Military History, United States Army, 2020.

MLA (9th ed.) Citation

Beard, Joseph A., and Shane D. Makowicki. The Lincoln Assassination. Center of Military History, United States Army, 2020.