APA

Newill D., Stewart M., . (1975). Use of low-grade materials in road construction in developing countries. London: Highway design in developing countries.

Chicago

Newill D, Stewart M, . 1975. Use of low-grade materials in road construction in developing countries. London: Highway design in developing countries.

Harvard

Newill D., Stewart M., . (1975). Use of low-grade materials in road construction in developing countries. London: Highway design in developing countries.

MLA

Newill D, Stewart M, . Use of low-grade materials in road construction in developing countries. London: Highway design in developing countries. 1975.