APA

United States, . (2018). Head health challenge: preventing head trauma from football field to shop floor to battlefield : hearing before the Subcommittee on Research and Technology, Committee on Science, Space, and Technology, House of Representatives, One Hundred Fifteenth Congress, first session, December 13, 2017. Washington: U.S. Government Publishing Office.

Chicago

United States, . 2018. Head health challenge: preventing head trauma from football field to shop floor to battlefield : hearing before the Subcommittee on Research and Technology, Committee on Science, Space, and Technology, House of Representatives, One Hundred Fifteenth Congress, first session, December 13, 2017. Washington: U.S. Government Publishing Office.

Harvard

United States, . (2018). Head health challenge: preventing head trauma from football field to shop floor to battlefield : hearing before the Subcommittee on Research and Technology, Committee on Science, Space, and Technology, House of Representatives, One Hundred Fifteenth Congress, first session, December 13, 2017. Washington: U.S. Government Publishing Office.

MLA

United States, . Head health challenge: preventing head trauma from football field to shop floor to battlefield : hearing before the Subcommittee on Research and Technology, Committee on Science, Space, and Technology, House of Representatives, One Hundred Fifteenth Congress, first session, December 13, 2017. Washington: U.S. Government Publishing Office. 2018.