APA

United States, . (2018). The appropriate role of states and the federal government in protecting groundwater: hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Fifteenth Congress, second session, April 18, 2018. Washington: U.S. Government Publishing Office.

Chicago

United States, . 2018. The appropriate role of states and the federal government in protecting groundwater: hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Fifteenth Congress, second session, April 18, 2018. Washington: U.S. Government Publishing Office.

Harvard

United States, . (2018). The appropriate role of states and the federal government in protecting groundwater: hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Fifteenth Congress, second session, April 18, 2018. Washington: U.S. Government Publishing Office.

MLA

United States, . The appropriate role of states and the federal government in protecting groundwater: hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Fifteenth Congress, second session, April 18, 2018. Washington: U.S. Government Publishing Office. 2018.