APA

United States, . (1973). The fuel shortage and the Clean air act: Hearing, Ninety-third Congress, first session on S. 2680. Washington: U.S. Govt. Print. Off.

Chicago

United States, . 1973. The fuel shortage and the Clean air act: Hearing, Ninety-third Congress, first session on S. 2680. Washington: U.S. Govt. Print. Off.

Harvard

United States, . (1973). The fuel shortage and the Clean air act: Hearing, Ninety-third Congress, first session on S. 2680. Washington: U.S. Govt. Print. Off.

MLA

United States, . The fuel shortage and the Clean air act: Hearing, Ninety-third Congress, first session on S. 2680. Washington: U.S. Govt. Print. Off. 1973.