Harnsamuk, Piyanun, and Karn Ruangmontri. 2020. “THE DEVELOPMENT OF PROGRAM TO ENHANCE MONTESSORI LEARNING MANAGEMENT COMPETENCY OF TEACHERS UNDER CHAIYAPHUM PRIMARY EDUCATIONAL SERVICE AREA OFFICE 1”. Journal of MCU Nakhondhat 7 (8). Nakhon Si Thammarat, Thailand:296-310. https://so03.tci-thaijo.org/index.php/JMND/article/view/246256.