Cyber security : responding to the threat of cyber crime and terrorism : hearing before the Subcommittee on Crime and Terrorism of the Committee on the Judiciary, United States Senate, One Hundred Twelfth Congress, first session, April 12, 2011.
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2011.