SANGSUWAN, W.; PRASONGSUK, K. THE GUIDELINES FOR INTERNAL QUALITY ASSURANCE OPERATION OF SINGHANATRACHALAI SCHOOL GROUP UNDER MAE HONG SON PRIMARY EDUCATIONAL SERVICE AREA OFFICE 1. Journal of Graduate School Sakon Nakhon Rajabhat University, Sakon Nakhon, Thailand, v. 23, n. 100, p. 131–145, 2026. Disponível em: https://so02.tci-thaijo.org/index.php/SNGSJ/article/view/277327. Acesso em: 1 oct. 2026.