Nonthapot, Sakkarin, and Thanet Wattanakul. 2014. “Analysis of Passenger Transportation Demand: Case Study of the Customs House, the Thai-Laos Friendship Bridge, Nong Khai Province”. Journal of Social and Development Sciences 5 (1): 1-6. https://doi.org/10.22610/jsds.v5i1.799.