APA
Jones T. E., . (1986). A study of the cost-effectiveness of grading unpaved roads in developing countries. Washington: Transport and road research laboratory.
Chicago
Jones T E, . 1986. A study of the cost-effectiveness of grading unpaved roads in developing countries. Washington: Transport and road research laboratory.
Harvard
Jones T. E., . (1986). A study of the cost-effectiveness of grading unpaved roads in developing countries. Washington: Transport and road research laboratory.
MLA
Jones T E, . A study of the cost-effectiveness of grading unpaved roads in developing countries. Washington: Transport and road research laboratory. 1986.