Rolt, L. T. C. (1967). Transport and communications. Methuen.
Cita Chicago (17th ed.)Rolt, L. T. C. Transport and Communications. London: Methuen, 1967.
Cita MLA (9th ed.)Rolt, L. T. C. Transport and Communications. Methuen, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.