Somrit S. UPRIGHT SCHOOL PROJECT “SRANG KAN DEE COMPANY” OF PHIANGLUANG 16 SCHOOL UNDER THE CHIANGRAI PRIMARY EDUCATIONAL SERVICE AREA OFFICE 4. JSBA [Internet]. 2022 Sep. 30 [cited 2024 May 15];7(9):248-65. Available from: https://so04.tci-thaijo.org/index.php/JSBA/article/view/260697