Graham, T., & Hansen, K. A. (2007). Spy satellites: And other intelligence technologies that changed history. University of Washington Press.
Lua i Stíl Chicago (17ú heag.)Graham, Thomas, agus Keith A. Hansen. Spy Satellites: And Other Intelligence Technologies That Changed History. Seattle: University of Washington Press, 2007.
Lua MLA (9ú heag.)Graham, Thomas, agus Keith A. Hansen. Spy Satellites: And Other Intelligence Technologies That Changed History. University of Washington Press, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.