APA
Transportation Research Circular 406, . (1993). Transportation planning, programming, and finance. Proceedings of a conference. Washington DC: Transportation Research Circular 406.
Chicago
Transportation Research Circular 406, . 1993. Transportation planning, programming, and finance. Proceedings of a conference. Washington DC: Transportation Research Circular 406.
Harvard
Transportation Research Circular 406, . (1993). Transportation planning, programming, and finance. Proceedings of a conference. Washington DC: Transportation Research Circular 406.
MLA
Transportation Research Circular 406, . Transportation planning, programming, and finance. Proceedings of a conference. Washington DC: Transportation Research Circular 406. 1993.