APA

Transportation Research record 1261, Highway and Facilities Design, . (1990). Geographic information systems 1990. Washington DC: Transportation Research record 1261.

Chicago

Transportation Research record 1261, Highway and Facilities Design, . 1990. Geographic information systems 1990. Washington DC: Transportation Research record 1261.

Harvard

Transportation Research record 1261, Highway and Facilities Design, . (1990). Geographic information systems 1990. Washington DC: Transportation Research record 1261.

MLA

Transportation Research record 1261, Highway and Facilities Design, . Geographic information systems 1990. Washington DC: Transportation Research record 1261. 1990.