APA

United States, . (1997). Enforcement of environmental laws: hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Fifth Congress, first session on the relationship between the federal and state governments in the enforcement of environmental laws, June 10, 1997. Washington: U.S. Government Printing Office.

Chicago

United States, . 1997. Enforcement of environmental laws: hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Fifth Congress, first session on the relationship between the federal and state governments in the enforcement of environmental laws, June 10, 1997. Washington: U.S. Government Printing Office.

Harvard

United States, . (1997). Enforcement of environmental laws: hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Fifth Congress, first session on the relationship between the federal and state governments in the enforcement of environmental laws, June 10, 1997. Washington: U.S. Government Printing Office.

MLA

United States, . Enforcement of environmental laws: hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Fifth Congress, first session on the relationship between the federal and state governments in the enforcement of environmental laws, June 10, 1997. Washington: U.S. Government Printing Office. 1997.