1. Ambinder, Marc, and Grady, D.B. 2013. Deep State: Inside the Government Secrecy Industry. Hoboken, NJ: John Wiley & Sons.
2. Axe, David. 2013. Shadow Wars: Chasing Conflict in an Era of Peace. Washington, DC: Potomac Books.
3. Bobich, Joshua A. 2007. “Note: Who Authorized This?!: An Assessment of the Process of Authorizing Covert Action.” William Mitchell Law Review 33 (3): 1111–1142.
4. CIA. 1996. “Covert Action, Loss of Life, and the Prohibition on Assassination, 1976–96.” CIA’s Office of General Counsel. http://nsarchive2.gwu.edu/NSAEBB/NSAEBB431/docs/intell_ebb_001.PDF .
5. Citizens’ Commission on Benghazi. 2016. “Betrayal in Benghazi: A Dereliction of Duty.” Accuracy in Media Inc., 29 June. http://www.aim.org/wp-content/uploads/2016/06/AIM-Citizens-Commission-on-Benghazi-FINAL-REPORT-June-2016.pdf .