Klangson, R., Pakdeejit, Y. and Cha-umpong, T. 2023. A Study on Internal Quality Assurance Management Problems of Small School under Phichit Primary Educational Service Area Office 1. Education journal Faculty of Education, Nakhon Sawan Rajabhat University . 6, 3 (Dec. 2023), 174–187. DOI:https://doi.org/10.2774.EDU2023.3.261806.