APA

Transportation Research Record nr 639, . (1977). Transportation system evaluation techniques. Washington DC: Transportation Research Record nr 639.

Chicago

Transportation Research Record nr 639, . 1977. Transportation system evaluation techniques. Washington DC: Transportation Research Record nr 639.

Harvard

Transportation Research Record nr 639, . (1977). Transportation system evaluation techniques. Washington DC: Transportation Research Record nr 639.

MLA

Transportation Research Record nr 639, . Transportation system evaluation techniques. Washington DC: Transportation Research Record nr 639. 1977.