Peayoo, S., S. Pongpinyoopas, and K. Jamjang. “The Development of Quality World–Class Standard School Strategies in the Lower North Area”. Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University, vol. 12, no. 1, June 2018, pp. 260-74, https://so01.tci-thaijo.org/index.php/GraduatePSRU/article/view/130961.