Sasiwanraya Makphong, Sittiporn Kao-un, Tossapon teekaporn, Tinagorn Poolputj. “Administration of Learning Resources Affecting Student Learning Achievements of Primary Schools under Nakhon Sawan Primary Educational Service Area Office 1”. SJIS-P, vol. 35, no. 1, Mar. 2023, pp. 588-93, http://sjis.scandinavian-iris.org/index.php/sjis/article/view/354.