Weille, J. d. (1966). Quantification of road user savings. World Bank.
Cita Chicago (17th ed.)Weille, Jan de. Quantification of Road User Savings. Washington, D.C.: World Bank, 1966.
Cita MLA (8th ed.)Weille, Jan de. Quantification of Road User Savings. World Bank, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.