Kunphichaijirawut, Natcharee. “A study of the problem of paying the enrollment fees beyond the specified period of students from Sisaket Rajabhat University: ณัชชารีย์ กุลพิชัยจิราวุฒิ1* Natcharee Kunphichaijirawut1* มหาวิทยาลัยราชภัฏศรีสะเกษ Sisaket Rajabhat University Corresponding Author : wan.natcharee@gmail.com”. Research and Development Journal Sisaket Rajabhat University 10, no. 1 (June 29, 2023): 32–44. accessed September 14, 2026. https://so01.tci-thaijo.org/index.php/sskru-resarch/article/view/264956.