Chicago

House of Representatives, Congress." House Hearing, 90th Congress - 1969 NASA authorization. Part 2: hearings before the Subcommittee on Manned Space Flight of the Committee on Science and Astronautics, U.S. House of Representatives, Ninetieth Congress, second session, on H.R. 15086 (superseded by H.R. 15856) .... Government. U.S. Government Printing Office https://www.govinfo.gov/app/details/CHRG-90hhrg89150Op2.

APA

House of Representatives, Congress. (1968, February 19). House Hearing, 90th Congress - 1969 NASA authorization. Part 2: hearings before the Subcommittee on Manned Space Flight of the Committee on Science and Astronautics, U.S. House of Representatives, Ninetieth Congress, second session, on H.R. 15086 (superseded by H.R. 15856) .... [Government]. U.S. Government Printing Office. https://www.govinfo.gov/app/details/CHRG-90hhrg89150Op2

MLA

House of Representatives, Congress. House Hearing, 90th Congress - 1969 NASA authorization. Part 2: hearings before the Subcommittee on Manned Space Flight of the Committee on Science and Astronautics, U.S. House of Representatives, Ninetieth Congress, second session, on H.R. 15086 (superseded by H.R. 15856) .... U.S. Government Printing Office, (19 Feb 1968), https://www.govinfo.gov/app/details/CHRG-90hhrg89150Op2

Bluebook

House of Representatives, Congress, 1969 NASA authorization. Part 2: hearings before the Subcommittee on Manned Space Flight of the Committee on Science and Astronautics, U.S. House of Representatives, Ninetieth Congress, second session, on H.R. 15086 (superseded by H.R. 15856) ..., GovInfo, (February 19, 1968), https://www.govinfo.gov/app/details/CHRG-90hhrg89150Op2