APA

United States, . (2019). The invasive species threat: protecting wildlife, public health, and infrastructure : hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Sixteenth Congress, first session, February 13, 2019. Washington: U.S. Government Publishing Office.

Chicago

United States, . 2019. The invasive species threat: protecting wildlife, public health, and infrastructure : hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Sixteenth Congress, first session, February 13, 2019. Washington: U.S. Government Publishing Office.

Harvard

United States, . (2019). The invasive species threat: protecting wildlife, public health, and infrastructure : hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Sixteenth Congress, first session, February 13, 2019. Washington: U.S. Government Publishing Office.

MLA

United States, . The invasive species threat: protecting wildlife, public health, and infrastructure : hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Sixteenth Congress, first session, February 13, 2019. Washington: U.S. Government Publishing Office. 2019.