APA

United States, . (2019). This is not a drill: an examination of emergency alert systems : hearing before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Fifteenth Congress, second session, January 25, 2018. Washington: U.S. Government Publishing Office.

Chicago

United States, . 2019. This is not a drill: an examination of emergency alert systems : hearing before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Fifteenth Congress, second session, January 25, 2018. Washington: U.S. Government Publishing Office.

Harvard

United States, . (2019). This is not a drill: an examination of emergency alert systems : hearing before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Fifteenth Congress, second session, January 25, 2018. Washington: U.S. Government Publishing Office.

MLA

United States, . This is not a drill: an examination of emergency alert systems : hearing before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Fifteenth Congress, second session, January 25, 2018. Washington: U.S. Government Publishing Office. 2019.