United States Intelligence Flights Over the Soviet Union--the U-2 Incident. Great Neck Publishing.
Chicago-referens (17:e uppl.)United States Intelligence Flights Over the Soviet Union--the U-2 Incident. Great Neck Publishing.
MLA-referens (9:e uppl.)United States Intelligence Flights Over the Soviet Union--the U-2 Incident. Great Neck Publishing.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.