1. Alexander, Keith B. (2004) Statement before the Committee on Armed Services, subcommittee on Strategic Forces, Fiscal Year 2005 Joint Military Intelligence Program (JMIP) and Army tactical Intelligence and Related Activities (TIARA), Hearing, 108th Congress, 2nd sess., 7 April.
2. Avant, Deborah (2005) The Market for Force. the Consequences of Privatizing Security, Cambridge: Cambridge University Press.
3. Baer, Robert (2007) ‘Just Who Does the CIA’s Work?’, Times, 20 April, viewed 23 June 2015, < http://www.time.com/time/nation/article/0,8599,1613011,00.html >.
4. Bamford, James (2004) ‘This Spy for Rent’, New York Times, 13 June, A13.
5. Cahlink, George (2004) ‘Security Agency Doubled Procurement Spending in Four Years’, Government Executive, 1 June, viewed 23 June 2015, < http://www.govexec.com/defense/2004/06/security-agency-doubled-procurement-spending-in-four-years/16825/ >.