APA

PTRC Proceedings of seminar H. P 208, . (1981). Highway design and maintenance in developing countries. London: PTRC Proceedings of seminar H. P 208.

Chicago

PTRC Proceedings of seminar H. P 208, . 1981. Highway design and maintenance in developing countries. London: PTRC Proceedings of seminar H. P 208.

Harvard

PTRC Proceedings of seminar H. P 208, . (1981). Highway design and maintenance in developing countries. London: PTRC Proceedings of seminar H. P 208.

MLA

PTRC Proceedings of seminar H. P 208, . Highway design and maintenance in developing countries. London: PTRC Proceedings of seminar H. P 208. 1981.