APA

United States, . (2015). EPA's proposed ozone rule: hearing before the Subcommittee on Energy and Power of the Committee on Energy and Commerce, House of Representatives, One Hundred Fourteenth Congress, first session, June 12, 2015. Washington: U.S. Government Publishing Office.

Chicago

United States, . 2015. EPA's proposed ozone rule: hearing before the Subcommittee on Energy and Power of the Committee on Energy and Commerce, House of Representatives, One Hundred Fourteenth Congress, first session, June 12, 2015. Washington: U.S. Government Publishing Office.

Harvard

United States, . (2015). EPA's proposed ozone rule: hearing before the Subcommittee on Energy and Power of the Committee on Energy and Commerce, House of Representatives, One Hundred Fourteenth Congress, first session, June 12, 2015. Washington: U.S. Government Publishing Office.

MLA

United States, . EPA's proposed ozone rule: hearing before the Subcommittee on Energy and Power of the Committee on Energy and Commerce, House of Representatives, One Hundred Fourteenth Congress, first session, June 12, 2015. Washington: U.S. Government Publishing Office. 2015.