APA

United States, . (2016). Oversight hearing: EPA's proposed National Ambient Air Quality Standards for ozone : hearing before the Subcommittee on Clean Air and Nuclear Safety of the Committee on Environment and Public Works, United States Senate, One Hundred Thirteenth Congress, second session, December 17, 2014. Washington: U.S. Government Publishing Office.

Chicago

United States, . 2016. Oversight hearing: EPA's proposed National Ambient Air Quality Standards for ozone : hearing before the Subcommittee on Clean Air and Nuclear Safety of the Committee on Environment and Public Works, United States Senate, One Hundred Thirteenth Congress, second session, December 17, 2014. Washington: U.S. Government Publishing Office.

Harvard

United States, . (2016). Oversight hearing: EPA's proposed National Ambient Air Quality Standards for ozone : hearing before the Subcommittee on Clean Air and Nuclear Safety of the Committee on Environment and Public Works, United States Senate, One Hundred Thirteenth Congress, second session, December 17, 2014. Washington: U.S. Government Publishing Office.

MLA

United States, . Oversight hearing: EPA's proposed National Ambient Air Quality Standards for ozone : hearing before the Subcommittee on Clean Air and Nuclear Safety of the Committee on Environment and Public Works, United States Senate, One Hundred Thirteenth Congress, second session, December 17, 2014. Washington: U.S. Government Publishing Office. 2016.