APA

United States, . (1929). Safety appliances (train control): hearing before subcommittee, 70th Congress, 2d session, on H.R. 15094, to create board for safety and betterment of the people, Jan. 16, 1929. [Washington, D.C.]: .

Chicago

United States, . 1929. Safety appliances (train control): hearing before subcommittee, 70th Congress, 2d session, on H.R. 15094, to create board for safety and betterment of the people, Jan. 16, 1929. [Washington, D.C.]: .

Harvard

United States, . (1929). Safety appliances (train control): hearing before subcommittee, 70th Congress, 2d session, on H.R. 15094, to create board for safety and betterment of the people, Jan. 16, 1929. [Washington, D.C.]: .

MLA

United States, . Safety appliances (train control): hearing before subcommittee, 70th Congress, 2d session, on H.R. 15094, to create board for safety and betterment of the people, Jan. 16, 1929. [Washington, D.C.]: . 1929.