Hilton, G. W. (1974). Federal transit subsidies: The urban mass transportation assistance program. American Enterprise Institute for Public Policy Research.
Cita Chicago (17th ed.)Hilton, George W. Federal Transit Subsidies: The Urban Mass Transportation Assistance Program. Washington: American Enterprise Institute for Public Policy Research, 1974.
Cita MLA (8th ed.)Hilton, George W. Federal Transit Subsidies: The Urban Mass Transportation Assistance Program. American Enterprise Institute for Public Policy Research, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.