↑ Samuels, Richard J., บ.ก. (December 21, 2005). Encyclopedia of United States National Security (1st ed.). SAGE Publications. p. 669. ISBN978-0-7619-2927-7. Most observers felt that the U.S. moon landing ended the space race with a decisive American victory. […] The formal end of the space race occurred with the 1975 joint Apollo-Soyuz mission, in which U.S. and Soviet spacecraft docked, or joined, in orbit while their crews visited one another's craft and performed joint scientific experiments.
