APA (7th ed.) Citation

United States. Congress. Senate. Committee on Public Works. Subcommittee on Air and Water Pollution & ProQuest (Firm). (1968). Air Pollution -- 1968: Hearings before the United States Senate Committee on Public Works, Subcommittee on Air and Water Pollution, Ninetieth Congress, second session, on Feb. 27-29, Mar. 4-6, 19, 20, 26, 1968. U.S. G.P.O..

Chicago Style (17th ed.) Citation

United States. Congress. Senate. Committee on Public Works. Subcommittee on Air and Water Pollution and ProQuest (Firm). Air Pollution -- 1968: Hearings Before the United States Senate Committee on Public Works, Subcommittee on Air and Water Pollution, Ninetieth Congress, Second Session, on Feb. 27-29, Mar. 4-6, 19, 20, 26, 1968. Washington: U.S. G.P.O., 1968.

MLA (9th ed.) Citation

United States. Congress. Senate. Committee on Public Works. Subcommittee on Air and Water Pollution and ProQuest (Firm). Air Pollution -- 1968: Hearings Before the United States Senate Committee on Public Works, Subcommittee on Air and Water Pollution, Ninetieth Congress, Second Session, on Feb. 27-29, Mar. 4-6, 19, 20, 26, 1968. U.S. G.P.O., 1968.