Wright, P. H., Ashford, N. J., & Stammer, R. J. (1998). Transportation engineering: Planning and design (4a. ed.). John Wiley.
Cita Chicago (17th ed.)Wright, Paul H., Norman J. Ashford, i Robert J. Stammer. Transportation Engineering: Planning and Design. 4a. ed. Nueva York: John Wiley, 1998.
Cita MLA (9th ed.)Wright, Paul H., et al. Transportation Engineering: Planning and Design. 4a. ed. John Wiley, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.