Sheewasukthaworn, W., P. Eiam-Anant, and O. Panin. “Song-Ku: A Local Ceremony and the Existence of Historical Sites in Maha Sarakham Province”. Journal of Mekong Societies, vol. 9, no. 3, Dec. 2013, pp. 123-4, https://so03.tci-thaijo.org/index.php/mekongjournal/article/view/15141.