ยอดแก้ว กัญญา, ศรีประเสริฐ เพียงพิศ, and เต็มรัตน์ สุภาพ. “The Quality Improvement in Early Childhood Education by Small Sized School Administrators under Krabi Primary Educational Service Area Office”. Journal of Graduate School, Pitchayatat, Ubon Ratchathani Rajabhat University 13, no. 2 (December 28, 2018): 1–9. Accessed May 19, 2024. https://so02.tci-thaijo.org/index.php/Pitchayatat/article/view/221623.