Watrasoke, S., D. Mattariganond, and T. Boonwanna. “The Vietnamese National Salvation Movement in Northeastern Region of Thailand: Udon Thani (1880s-1930s)”. Journal of Mekong Societies, vol. 10, no. 1, Apr. 2014, pp. 113-38, https://so03.tci-thaijo.org/index.php/mekongjournal/article/view/17726.