APA

United States, . (2017). EPA's 2015 ozone standard: concerns over science and implementation : hearing before the Committee on Science, Space, and Technology, House of Representatives, One Hundred Fourteenth Congress, first session, October 22, 2015. Washington: U.S. Government Publishing Office.

Chicago

United States, . 2017. EPA's 2015 ozone standard: concerns over science and implementation : hearing before the Committee on Science, Space, and Technology, House of Representatives, One Hundred Fourteenth Congress, first session, October 22, 2015. Washington: U.S. Government Publishing Office.

Harvard

United States, . (2017). EPA's 2015 ozone standard: concerns over science and implementation : hearing before the Committee on Science, Space, and Technology, House of Representatives, One Hundred Fourteenth Congress, first session, October 22, 2015. Washington: U.S. Government Publishing Office.

MLA

United States, . EPA's 2015 ozone standard: concerns over science and implementation : hearing before the Committee on Science, Space, and Technology, House of Representatives, One Hundred Fourteenth Congress, first session, October 22, 2015. Washington: U.S. Government Publishing Office. 2017.