Saiful Alam & Iphan F. Radam. “THE DETERMINATION OF TRANSPORT ROUTE AND VEHICLE OPERATING COSTS FOR WASTE COLLECTION TRUCK IN PURUK CAHU CITY”. International Journal of Research Science and Management 6, no. 2 (February 28, 2019): 48–62. Accessed December 23, 2024. http://ijrsm.com/index.php/journal-ijrsm/article/view/188.