Gruntman, M. (2004). Blazing the trail: The early history of spacecraft and rocketry. American Institute of Aeronautics and Astronautics.
Chicago-referens (17:e uppl.)Gruntman, Mike. Blazing the Trail: The Early History of Spacecraft and Rocketry. Reston, Va.: American Institute of Aeronautics and Astronautics, 2004.
MLA-referens (9:e uppl.)Gruntman, Mike. Blazing the Trail: The Early History of Spacecraft and Rocketry. American Institute of Aeronautics and Astronautics, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.