APA

United States, . (1970). Environmental quality education act of 1970: Hearings, Ninety-first Congress, second session, on H.R. 14753. Washington: U.S. Govt. Print. Off.

Chicago

United States, . 1970. Environmental quality education act of 1970: Hearings, Ninety-first Congress, second session, on H.R. 14753. Washington: U.S. Govt. Print. Off.

Harvard

United States, . (1970). Environmental quality education act of 1970: Hearings, Ninety-first Congress, second session, on H.R. 14753. Washington: U.S. Govt. Print. Off.

MLA

United States, . Environmental quality education act of 1970: Hearings, Ninety-first Congress, second session, on H.R. 14753. Washington: U.S. Govt. Print. Off. 1970.