APA

Green P., Insley H., . (1975). Economic use of labour-intensive methods for the construction of low-cost roads. London: Highway design in developing countries.

Chicago

Green PA, Insley HTM, . 1975. Economic use of labour-intensive methods for the construction of low-cost roads. London: Highway design in developing countries.

Harvard

Green P., Insley H., . (1975). Economic use of labour-intensive methods for the construction of low-cost roads. London: Highway design in developing countries.

MLA

Green PA, Insley HTM, . Economic use of labour-intensive methods for the construction of low-cost roads. London: Highway design in developing countries. 1975.