Supachai Lakkam และ Saiprasit Koetniyom. (2020) Development of city-bus assessment in Thailand. <i>Songklanakarin Journal of Science and Technology</i>, <i>42</i>(6), 1407-1413.Supachai Lakkam และ Saiprasit Koetniyom. "Development of city-bus assessment in Thailand". Songklanakarin Journal of Science and Technology 42 (2020):1407-1413.Supachai Lakkam และ Saiprasit Koetniyom. Development of city-bus assessment in Thailand. Research and Development Office, Prince of Songkla University:ม.ป.ท. 2020.