Tham khảo Thuyết_âm_mưu

Tham khảo Thuyết_âm_mưu_UFO

Edward J. Ruppelt. The Report on Unidentified Flying Objects. 1956, coi online:
Philip J. Klass. UFOs Explained New York: Random House, 1974. ISBN 0-394-49215-3.
Timothy Good. Above Top Secret. New York: William Morrow & Co., 1988. ISBN 0-688-09202-0.
Clark, Jerome. The Ufo Book: Encyclopedia of the Extraterrestrial. Visible Ink, 1998. ISBN 1-57859-029-9.
Rose, Bill and Buttler, Tony. Flying Saucer Aircraft (Secret Projects). Leicester, UK: Midland Publishing, 2006. ISBN 1-85780-233-0.
Peebles, Curtis. Watch the Skies! A Chronicle of the Flying Saucer Myth. Washington, DC:Smithsonian Institution, 1994. ISBN 1-56098-343-4.
Dolan, Richard M. UFOs and the National Security State: An Unclassified History, Volume One: 1941–1973. Keyhole Publishing, 2000. ISBN 0-9666885-0-3.
Fawcett, Lawrence and Greenwood, Barry J. The UFO Cover-Up (originally Clear Intent). New York: Fireside Books (Simon & Schuster), 1992. ISBN 0-671-76555-8.

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