Hill, C. N. (2001). A vertical empire: The history of the UK rocket and space programme, 1950-1971. Imperial College Press ; World Scientific Pub. [distributor].
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHill, C. N. A Vertical Empire: The History of the UK Rocket and Space Programme, 1950-1971. London : River Edge, NJ: Imperial College Press ; World Scientific Pub. [distributor], 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHill, C. N. A Vertical Empire: The History of the UK Rocket and Space Programme, 1950-1971. Imperial College Press ; World Scientific Pub. [distributor], 2001.
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