APA

United States, . (2018). NASA's next four large telescopes: hearing before the Subcommittee on Space, Committee on Science, Space, and Technology, House of Representatives, One Hundred Fifteenth Congress, first session, December 6, 2017. Washington: U.S. Government Publishing Office.

Chicago

United States, . 2018. NASA's next four large telescopes: hearing before the Subcommittee on Space, Committee on Science, Space, and Technology, House of Representatives, One Hundred Fifteenth Congress, first session, December 6, 2017. Washington: U.S. Government Publishing Office.

Harvard

United States, . (2018). NASA's next four large telescopes: hearing before the Subcommittee on Space, Committee on Science, Space, and Technology, House of Representatives, One Hundred Fifteenth Congress, first session, December 6, 2017. Washington: U.S. Government Publishing Office.

MLA

United States, . NASA's next four large telescopes: hearing before the Subcommittee on Space, Committee on Science, Space, and Technology, House of Representatives, One Hundred Fifteenth Congress, first session, December 6, 2017. Washington: U.S. Government Publishing Office. 2018.