Butkaew, Poonsak, and Tawil Ladawan. 2019. “STRATEGY FOR PROFESSIONAL COMPETENCY DEVELOPMENT OF PRIMARY SCHOOL ADMINISTRATORS IN NAKHON RATCHASIMA PRIMARY EDUCATION AREA”. Journal of Graduate MCU KhonKaen Campus 6 (4):235-50. https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/227630.