United States. Interstate Commerce Commission. (1929). Annual report of block signals, automatic train control, and use of train orders; instructions and definitions. U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Interstate Commerce Commission. Annual Report of Block Signals, Automatic Train Control, and Use of Train Orders; Instructions and Definitions. Washington: U.S. GPO, 1929.
MLA (9th ed.) CitationUnited States. Interstate Commerce Commission. Annual Report of Block Signals, Automatic Train Control, and Use of Train Orders; Instructions and Definitions. U.S. GPO, 1929.
Warning: These citations may not always be 100% accurate.