ศรีปากดี นฤพนธ์, and ศรีพุทธรินทร์ สุมาลี. “Situations of Implementation in Non-Formal Education Based on Students’ Perceptions under Non-Formal Education and Informal Education Center in Chanpen Sub-District, Tao-Ngoi District, Sakon Nakhon Province”. RMUTI Journal Humanities and Social Sciences 3, no. 1 (June 30, 2016): 104–113. Accessed April 25, 2024. https://so05.tci-thaijo.org/index.php/RMUTI_SS/article/view/193664.