Wright, P. H., Ashford, N. J., & Stammer, R. J. (1998). Transportation engineering: Planing and design (4th ed.). New York: John Wiley and Sons.
Παραπομπή Chicago StyleWright, Paul H., Norman J. Ashford, και Robert J. Stammer. Transportation Engineering: Planing and Design. 4th ed. New York: John Wiley and Sons, 1998.
Παραπομπή MLAWright, Paul H., Norman J. Ashford, και Robert J. Stammer. Transportation Engineering: Planing and Design. 4th ed. New York: John Wiley and Sons, 1998.
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