YanKomuth, Noppornpan, Chairat Pranee, and Siripo Panawong. 2015. “Development a Model of Internal Supervision With Lesson Study”. Academic Journal of Thailand National Sports University 7 (3). Chonburi, Thailand:123-38. https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/256687.