Siddiqi, A. A. (2000). Challenge to Apollo: The Soviet Union and the space race, 1945-1974. National Aeronautics and Space Administration, NASA History Div., Office of Policy and Plans.
Citace podle Chicago (17th ed.)Siddiqi, Asif A. Challenge to Apollo: The Soviet Union and the Space Race, 1945-1974. Washington, D.C.: National Aeronautics and Space Administration, NASA History Div., Office of Policy and Plans, 2000.
Citace podle MLA (8th ed.)Siddiqi, Asif A. Challenge to Apollo: The Soviet Union and the Space Race, 1945-1974. National Aeronautics and Space Administration, NASA History Div., Office of Policy and Plans, 2000.
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