5Richard K. Bett. Surprise Attack: Lessons for Defense Planning. Washington, D.C. :Brookings Institution, 1982.
6Richard W. Rowan with Robert B. Deindorfer, Secret Service: 33 Centuries of Espionage.
7Ronald Seth. Encyclopedia of Espionage. Garden City, N. Y. : Doubleday and Co. , 1974.
8Roberr F. Kennedy. Thirteen Days: A Memoir of the Cuba Missile Crisis. New York : W.W. Norton, 1969.
9T. L Cubbage. German Misapprehensions Regard Overload: Understanding Failure in the Estimative Process. Intelligenee and National Security 2 (July 1987).