United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on National Parks. (2007). Current national parks legislation: Hearing before the Subcommittee on National Parks of the Committee on Energy and Natural Resources, United States Senate, One Hundred Tenth Congress, first session, on S. 553, S. 800, S. 916, S. 1057, S. 1209, S. 1281, H.R. 161, H.R. 247, H.R. 376, May 15, 2007. U.S. G.P.O..
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on National Parks. Current National Parks Legislation: Hearing Before the Subcommittee on National Parks of the Committee on Energy and Natural Resources, United States Senate, One Hundred Tenth Congress, First Session, on S. 553, S. 800, S. 916, S. 1057, S. 1209, S. 1281, H.R. 161, H.R. 247, H.R. 376, May 15, 2007. Washington: U.S. G.P.O., 2007.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on National Parks. Current National Parks Legislation: Hearing Before the Subcommittee on National Parks of the Committee on Energy and Natural Resources, United States Senate, One Hundred Tenth Congress, First Session, on S. 553, S. 800, S. 916, S. 1057, S. 1209, S. 1281, H.R. 161, H.R. 247, H.R. 376, May 15, 2007. U.S. G.P.O., 2007.