Sengsoulichanh, V. “The Model of Waste Management Toward Effectiveness of Kaisornphomvihan City, Savannakhet Province, Lao People’s Democratic Republic”. Journal of Research and Development Institute Rajabhat Maha Sarakham University, vol. 7, no. 1, June 2020, pp. 343-56, https://so03.tci-thaijo.org/index.php/rdirmu/article/view/245087.