APA

United States, . (1972). Hearings establish Dept. of Natural Resources. [Washington, D.C: .

Chicago

United States, . 1972. Hearings establish Dept. of Natural Resources. [Washington, D.C: .

Harvard

United States, . (1972). Hearings establish Dept. of Natural Resources. [Washington, D.C: .

MLA

United States, . Hearings establish Dept. of Natural Resources. [Washington, D.C: . 1972.