REFERENCES
- The specifics in Duane R. Clarridge's memoir of his years in the secrete world, A Spy for All Seasons: My Life in the CIA (New York: Scribner, 1997), written with Digby Diehl, took Agency veterans by surprise.
- Clarence Ashley, CIA Spymaster, [George Kisevalter], (Gretna, LA: Pelican Publishing, 2004).
- David Stafford, The Silent Game: The Real World of Imaginary Spies (London: Viking, 1988), p. 3.