United States. Congress. Senate. Committee on Energy and Natural Resources. (2012). Usage of natural gas: Hearing before the Committee on Energy and Natural Resources, United States Senate, One Hundred Twelfth Congress, second session, to assess the opportunities for, current level of investment in, and barriers to the expanded usage of natural gas as a fuel for transportation, July 24, 2012. U.S. G.P.O..
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on Energy and Natural Resources. Usage of Natural Gas: Hearing Before the Committee on Energy and Natural Resources, United States Senate, One Hundred Twelfth Congress, Second Session, to Assess the Opportunities for, Current Level of Investment in, and Barriers to the Expanded Usage of Natural Gas as a Fuel for Transportation, July 24, 2012. Washington: U.S. G.P.O., 2012.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on Energy and Natural Resources. Usage of Natural Gas: Hearing Before the Committee on Energy and Natural Resources, United States Senate, One Hundred Twelfth Congress, Second Session, to Assess the Opportunities for, Current Level of Investment in, and Barriers to the Expanded Usage of Natural Gas as a Fuel for Transportation, July 24, 2012. U.S. G.P.O., 2012.