Konvimon, Nasrung, and Patthira Phon-ngam. 2019. “The Development of Activities for Promotion the 21st Century Learning Skills of Students under the Office of Loei Primary Education Area 2 by Local Wisdom in Loei Province”. Journal of Graduate MCU KhonKaen Campus 6 (4):203-20. https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/228782.