United States. Congress. Senate. Committee on Environment and Public Works. (2014). Examining threats and protections for the polar bear: Hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Tenth Congress, second session, January 30, 2008. U.S. Government Printing Office.
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on Environment and Public Works. Examining Threats and Protections for the Polar Bear: Hearing Before the Committee on Environment and Public Works, United States Senate, One Hundred Tenth Congress, Second Session, January 30, 2008. Washington: U.S. Government Printing Office, 2014.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on Environment and Public Works. Examining Threats and Protections for the Polar Bear: Hearing Before the Committee on Environment and Public Works, United States Senate, One Hundred Tenth Congress, Second Session, January 30, 2008. U.S. Government Printing Office, 2014.