หมั่นเขตร์กรณ์ ศิรินภา. 2022. “A Study of the Problem of School Administration in Joint Learning According to the Seat Framework in the Group United Campus Thung Hin Theun under the Office of Secondary Education Service Area Area 42”. Education Journal Faculty of Education, Nakhon Sawan Rajabhat University 3 (2). Nakhon Sawan,Thailand:27-39. https://so02.tci-thaijo.org/index.php/edunsrujo/article/view/254295.