United States. Congress. House. Committee on Science and Astronautics. Subcommittee on Manned Space Flight & ProQuest (Firm). (1968). 1969 NASA Authorization: Hearings before the United States House Committee on Science and Astronautics, Subcommittee on Manned Space Flight, Ninetieth Congress, second session, on Feb. 10, 20, 21, 1968. U.S. G.P.O..
Chicago Style (17th ed.) CitationUnited States. Congress. House. Committee on Science and Astronautics. Subcommittee on Manned Space Flight and ProQuest (Firm). 1969 NASA Authorization: Hearings Before the United States House Committee on Science and Astronautics, Subcommittee on Manned Space Flight, Ninetieth Congress, Second Session, on Feb. 10, 20, 21, 1968. Washington: U.S. G.P.O., 1968.
MLA (9th ed.) CitationUnited States. Congress. House. Committee on Science and Astronautics. Subcommittee on Manned Space Flight and ProQuest (Firm). 1969 NASA Authorization: Hearings Before the United States House Committee on Science and Astronautics, Subcommittee on Manned Space Flight, Ninetieth Congress, Second Session, on Feb. 10, 20, 21, 1968. U.S. G.P.O., 1968.