United States. Congress. House. Committee on Homeland Security & ProQuest (Firm). (2008). The challenge of protecting mass gatherings in a post 9/11 world: Hearing before the Committee on Homeland Security, House of Representatives, One Hundred Tenth Congress, second session, July 9, 2008. U.S. G.P.O..
Chicago Style (17th ed.) CitationUnited States. Congress. House. Committee on Homeland Security and ProQuest (Firm). The Challenge of Protecting Mass Gatherings in a Post 9/11 World: Hearing Before the Committee on Homeland Security, House of Representatives, One Hundred Tenth Congress, Second Session, July 9, 2008. Washington: U.S. G.P.O., 2008.
MLA (9th ed.) CitationUnited States. Congress. House. Committee on Homeland Security and ProQuest (Firm). The Challenge of Protecting Mass Gatherings in a Post 9/11 World: Hearing Before the Committee on Homeland Security, House of Representatives, One Hundred Tenth Congress, Second Session, July 9, 2008. U.S. G.P.O., 2008.