APA

United States, . (2019). Surface transportation security: addressing current and emerging threats : hearing before the Subcommittee on Surface Transportation and Merchant Marine Infrastructure, Safety and Security of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Fifteenth Congress, second session, January 23, 2018. Washington: U.S. Government Publishing Office.

Chicago

United States, . 2019. Surface transportation security: addressing current and emerging threats : hearing before the Subcommittee on Surface Transportation and Merchant Marine Infrastructure, Safety and Security of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Fifteenth Congress, second session, January 23, 2018. Washington: U.S. Government Publishing Office.

Harvard

United States, . (2019). Surface transportation security: addressing current and emerging threats : hearing before the Subcommittee on Surface Transportation and Merchant Marine Infrastructure, Safety and Security of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Fifteenth Congress, second session, January 23, 2018. Washington: U.S. Government Publishing Office.

MLA

United States, . Surface transportation security: addressing current and emerging threats : hearing before the Subcommittee on Surface Transportation and Merchant Marine Infrastructure, Safety and Security of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Fifteenth Congress, second session, January 23, 2018. Washington: U.S. Government Publishing Office. 2019.