Boonnak ส. THE RELATIONSHIP BETWEEN INSTRUCTIONAL LEADERSHIP OF PRINCIPALS AND PROFESSIONAL LEARNING COMMUNITY OF SCHOOLS UNDER LOEI PRIMARY EDUCATIONAL SERVICE AREA OFFICE 2. Integr. Soc. Sci. J. [Internet]. 2022 Apr. 30 [cited 2026 Nov. 10];2(4):57-68. Available from: https://ojs.mbuslc.ac.th/index.php/issj/article/view/76