Graham, T., & Hansen, K. A. (2007). Spy satellites: And other intelligence technologies that changed history. University of Washington Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGraham, Thomas, और Keith A. Hansen. Spy Satellites: And Other Intelligence Technologies That Changed History. Seattle: University of Washington Press, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGraham, Thomas, और Keith A. Hansen. Spy Satellites: And Other Intelligence Technologies That Changed History. University of Washington Press, 2007.
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