APA

United States, . (1972). Report to Congress: water pollution abatement program, assessment of federal and state enforcement efforts, Environmental Protection Agency. [Washington, D.C: .

Chicago

United States, . 1972. Report to Congress: water pollution abatement program, assessment of federal and state enforcement efforts, Environmental Protection Agency. [Washington, D.C: .

Harvard

United States, . (1972). Report to Congress: water pollution abatement program, assessment of federal and state enforcement efforts, Environmental Protection Agency. [Washington, D.C: .

MLA

United States, . Report to Congress: water pollution abatement program, assessment of federal and state enforcement efforts, Environmental Protection Agency. [Washington, D.C: . 1972.