National Security Archive (U.S.) & Chadwyck-Healey, Inc. U.S. espionage and intelligence: Organization, operations, and management.
Chicago-viite (17. p.)National Security Archive (U.S.) ja Inc Chadwyck-Healey. U.S. Espionage and Intelligence: Organization, Operations, and Management.
MLA-viite (8. p.)National Security Archive (U.S.) ja Inc Chadwyck-Healey. U.S. Espionage and Intelligence: Organization, Operations, and Management.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.