APA

United States, . (1973). Report to Congress: improved federal and state programs needed to insure purity and safety of drinking water in United States, Environmental Protection Agency. [Washington, D.C: .

Chicago

United States, . 1973. Report to Congress: improved federal and state programs needed to insure purity and safety of drinking water in United States, Environmental Protection Agency. [Washington, D.C: .

Harvard

United States, . (1973). Report to Congress: improved federal and state programs needed to insure purity and safety of drinking water in United States, Environmental Protection Agency. [Washington, D.C: .

MLA

United States, . Report to Congress: improved federal and state programs needed to insure purity and safety of drinking water in United States, Environmental Protection Agency. [Washington, D.C: . 1973.