Sangthongchai P- on, Yurarach S. Management Approaches to Enhance Students’ Happiness in Schools under the Samut Prakan Secondary Educational Service Area Office. J. EDU. YRU [internet]. 2026 Apr. 30 [cited 2026 Sep. 11];5(1):76-88. available from: https://so08.tci-thaijo.org/index.php/jeduyru/article/view/5958