Phunsangka T, Sirikase B. 21st Century Administrator’s Skills Effective to Professional Learning Community of Schools Under Loei Primary Educational Service Area Office 1: 21st Century Administrator’s Skills Effective to Professional Learning Community of Schools Under Loei Primary Educational Service Area Office 1. rtnb [internet]. 2023 Aug. 31 [cited 2025 Apr. 7];5(2):582-600. available from: https://so07.tci-thaijo.org/index.php/rtnb/article/view/3274