United States. Congress. Senate. Committee on Commerce, Science, and Transportation. (2012). Concussions and the marketing of sports equipment: Hearing before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Twelfth Congress, first session, October 19, 2011. U.S. G.P.O..
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on Commerce, Science, and Transportation. Concussions and the Marketing of Sports Equipment: Hearing Before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Twelfth Congress, First Session, October 19, 2011. Washington: U.S. G.P.O., 2012.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on Commerce, Science, and Transportation. Concussions and the Marketing of Sports Equipment: Hearing Before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Twelfth Congress, First Session, October 19, 2011. U.S. G.P.O., 2012.