Tonglad, S., and P. Chansirisira. “DEVELOPING GUIDELINES FOR STRENGTHENING STUDENTS’ SELF - DISCIPLINE UNDER THE OFFICE OF KALASIN PRIMARY EDUCATION SERVICE AREA 3”. Journal of MCU Nakhondhat, vol. 8, no. 3, Mar. 2021, pp. 159-71, https://so03.tci-thaijo.org/index.php/JMND/article/view/251159.