APA

United States, . (2018). Reopening the American frontier: exploring how the outer space treaty will impact American commerce and settlement in space : hearing before the Subcommittee on Space, Science, and Competitiveness of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Fifteenth Congress, first session, May 23, 2017. Washington: U.S. Government Publishing Office.

Chicago

United States, . 2018. Reopening the American frontier: exploring how the outer space treaty will impact American commerce and settlement in space : hearing before the Subcommittee on Space, Science, and Competitiveness of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Fifteenth Congress, first session, May 23, 2017. Washington: U.S. Government Publishing Office.

Harvard

United States, . (2018). Reopening the American frontier: exploring how the outer space treaty will impact American commerce and settlement in space : hearing before the Subcommittee on Space, Science, and Competitiveness of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Fifteenth Congress, first session, May 23, 2017. Washington: U.S. Government Publishing Office.

MLA

United States, . Reopening the American frontier: exploring how the outer space treaty will impact American commerce and settlement in space : hearing before the Subcommittee on Space, Science, and Competitiveness of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Fifteenth Congress, first session, May 23, 2017. Washington: U.S. Government Publishing Office. 2018.