Khemapech, Ittipong, and Lakkana Kidbunjong. “Analysis of Excessive Cost of Overlapped Bus Route System in Bangkok”. NIDA Case Research Journal 7, no. 1 (April 30, 2015): 120–149. Accessed May 17, 2024. https://so04.tci-thaijo.org/index.php/NCRJ/article/view/35835.