Chicago

House of Representatives, Congress." House Hearing, 91st Congress - Department of the Interior and related agencies appropriations for 1971. Part 3, Bureau of Outdoor Recreation; National Park Service; Office of the Secretary: hearings before a subcommittee of the Committee on Appropriations, House of Representatives, Ninety-first Congress, second session.. Government. U.S. Government Publishing Office https://www.govinfo.gov/app/details/CHRG-91hhrg43215Op3.

APA

House of Representatives, Congress. (1970, March 18). House Hearing, 91st Congress - Department of the Interior and related agencies appropriations for 1971. Part 3, Bureau of Outdoor Recreation; National Park Service; Office of the Secretary: hearings before a subcommittee of the Committee on Appropriations, House of Representatives, Ninety-first Congress, second session.. [Government]. U.S. Government Publishing Office. https://www.govinfo.gov/app/details/CHRG-91hhrg43215Op3

MLA

House of Representatives, Congress. House Hearing, 91st Congress - Department of the Interior and related agencies appropriations for 1971. Part 3, Bureau of Outdoor Recreation; National Park Service; Office of the Secretary: hearings before a subcommittee of the Committee on Appropriations, House of Representatives, Ninety-first Congress, second session.. U.S. Government Publishing Office, (18 Mar 1970), https://www.govinfo.gov/app/details/CHRG-91hhrg43215Op3

Bluebook

House of Representatives, Congress, Department of the Interior and related agencies appropriations for 1971. Part 3, Bureau of Outdoor Recreation; National Park Service; Office of the Secretary: hearings before a subcommittee of the Committee on Appropriations, House of Representatives, Ninety-first Congress, second session., GovInfo, (March 18, 1970), https://www.govinfo.gov/app/details/CHRG-91hhrg43215Op3