Kaewyasri, Watcharapong, and Chakgrit Podapol. 2023. “Performance Morale of Teachers in Schools under Loei Primary Educational Service Area Office 1: Performance Morale of Teachers in Schools under Loei Primary Educational Service Area Office 1”. RATANABUTH JOURNAL 5 (3). Yasothon, Thailand:341-55. https://so07.tci-thaijo.org/index.php/rtnb/article/view/3788.