Pitukkecha, Aphinya, and Pim-on Sod-ium. 2023. “Development of Linear Structural Equation Model of Factors Affecting the Effectiveness of Schools under the Office of Primary Educational Service Area, Loei Province: Development of Linear Structural Equation Model of Factors Affecting the Effectiveness of Schools under the Office of Primary Educational Service Area, Loei Province”. RATANABUTH JOURNAL 5 (1). Yasothon, Thailand:254-70. https://so07.tci-thaijo.org/index.php/rtnb/article/view/2543.