(en) Kent T. Woods, Rangers Lead The Way : The Vision Of General Creighton W. Abrams (projet de recherche en stratégie), Carlisle Barracks, Pennsylvanie, US Army War College, , 27 p. (lire en ligne), p. 6-7.
Woods 2003, p. 8. Ce rôle est devenu explicite dans les chartes de deux successeurs d'Abrams, John Wickham et Gordon R. Sullivan ((en) Ken Keen, 75th Ranger Regiment : Strategic Force for the 21st Century (projet de recherche en stratégie), Carlisle Barracks, Pennsylvanie, US Army War College, , 40 p. (lire en ligne), p. 29-30, 34 note 10).
fas.org
(en) USSOCOM History and Research Office, United States Special Operations Command History 1987-2007, MacDill AFB, Floride, (lire en ligne), p. 33-38.
hsdl.org
Audition du général en retraite Wayne A. Downing, (en) Assessing U.S. Special Operations Command's Missions and Roles : Hearings Before the Terrorism, Unconventional Threats, and Capabilities Subcommittee of the Committee on Armed Services, House of Representatives, One Hundred Ninth Congress, Second Session, Hearing held June 29, 2006, US Government Printing Office, (lire en ligne), p. 22.