APA

United States, . (2017). Review of recent Environmental Protection Agency's air standards for hydraulically fractured natural gas wells and oil and natural gas storage: hearing before the Subcommittee on Clean Air and Nuclear Safety of the Committee on Environment and Public Works, United States Senate, One Hundred Twelfth Congress, second session, June 19, 2012. Washington: U.S. Government Publishing Office.

Chicago

United States, . 2017. Review of recent Environmental Protection Agency's air standards for hydraulically fractured natural gas wells and oil and natural gas storage: hearing before the Subcommittee on Clean Air and Nuclear Safety of the Committee on Environment and Public Works, United States Senate, One Hundred Twelfth Congress, second session, June 19, 2012. Washington: U.S. Government Publishing Office.

Harvard

United States, . (2017). Review of recent Environmental Protection Agency's air standards for hydraulically fractured natural gas wells and oil and natural gas storage: hearing before the Subcommittee on Clean Air and Nuclear Safety of the Committee on Environment and Public Works, United States Senate, One Hundred Twelfth Congress, second session, June 19, 2012. Washington: U.S. Government Publishing Office.

MLA

United States, . Review of recent Environmental Protection Agency's air standards for hydraulically fractured natural gas wells and oil and natural gas storage: hearing before the Subcommittee on Clean Air and Nuclear Safety of the Committee on Environment and Public Works, United States Senate, One Hundred Twelfth Congress, second session, June 19, 2012. Washington: U.S. Government Publishing Office. 2017.