ศิริอามาตย์ อาธิชา, and ภัททิยธนี สมนึก. 2018. “Causal Factors Affecting Self-Management towards Mathematical Learning of the Sixth-Grade Students in Khon Kaen Primary Educational Service Area Office 1”. Journal of Roi Et Rajabhat University 12 (2):13-22. https://so03.tci-thaijo.org/index.php/reru/article/view/165090.