APA

United States, . (2002). Ensuring content protection in the digital age: hearing before the Subcommittee on Telecommunications and the Internet of the Committee on Energy and Commerce, House of Representatives, One Hundred Seventh Congress, second session, April 25, 2002. Washington: U.S. G.P.O.

Chicago

United States, . 2002. Ensuring content protection in the digital age: hearing before the Subcommittee on Telecommunications and the Internet of the Committee on Energy and Commerce, House of Representatives, One Hundred Seventh Congress, second session, April 25, 2002. Washington: U.S. G.P.O.

Harvard

United States, . (2002). Ensuring content protection in the digital age: hearing before the Subcommittee on Telecommunications and the Internet of the Committee on Energy and Commerce, House of Representatives, One Hundred Seventh Congress, second session, April 25, 2002. Washington: U.S. G.P.O.

MLA

United States, . Ensuring content protection in the digital age: hearing before the Subcommittee on Telecommunications and the Internet of the Committee on Energy and Commerce, House of Representatives, One Hundred Seventh Congress, second session, April 25, 2002. Washington: U.S. G.P.O. 2002.