APA

Transportation Research Board, . (1981). Labor-based construction and maintenance of low-volume roads. Washington: Transportation technology support for developing countries. Synthesis 3.

Chicago

Transportation Research Board, . 1981. Labor-based construction and maintenance of low-volume roads. Washington: Transportation technology support for developing countries. Synthesis 3.

Harvard

Transportation Research Board, . (1981). Labor-based construction and maintenance of low-volume roads. Washington: Transportation technology support for developing countries. Synthesis 3.

MLA

Transportation Research Board, . Labor-based construction and maintenance of low-volume roads. Washington: Transportation technology support for developing countries. Synthesis 3. 1981.