(1976). Manual of traffic engineering studies (4rd ed.). Washington, D.C: Institute of Traffic Engineers.
Παραπομπή Chicago StyleManual of Traffic Engineering Studies. 4rd ed. Washington, D.C: Institute of Traffic Engineers, 1976.
Παραπομπή MLAManual of Traffic Engineering Studies. 4rd ed. Washington, D.C: Institute of Traffic Engineers, 1976.
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