APA

United States, . (1977). Oversight hearings on the Coal mine health and safety act of 1969 (excluding title IV) ; hearings before the Subcommittee on Labor Standards of the Committee on Education and Labor, House of Representatives, Ninety-fifth Congress, first session. Washington: U.S. Govt. Print. Off.

Chicago

United States, . 1977. Oversight hearings on the Coal mine health and safety act of 1969 (excluding title IV) ; hearings before the Subcommittee on Labor Standards of the Committee on Education and Labor, House of Representatives, Ninety-fifth Congress, first session. Washington: U.S. Govt. Print. Off.

Harvard

United States, . (1977). Oversight hearings on the Coal mine health and safety act of 1969 (excluding title IV) ; hearings before the Subcommittee on Labor Standards of the Committee on Education and Labor, House of Representatives, Ninety-fifth Congress, first session. Washington: U.S. Govt. Print. Off.

MLA

United States, . Oversight hearings on the Coal mine health and safety act of 1969 (excluding title IV) ; hearings before the Subcommittee on Labor Standards of the Committee on Education and Labor, House of Representatives, Ninety-fifth Congress, first session. Washington: U.S. Govt. Print. Off. 1977.