Tonglad S, Chansirisira P. DEVELOPING GUIDELINES FOR STRENGTHENING STUDENTS’ SELF - DISCIPLINE UNDER THE OFFICE OF KALASIN PRIMARY EDUCATION SERVICE AREA 3. JMND [internet]. 2021 Mar. 31 [cited 2025 Dec. 5];8(3):159-71. available from: https://so03.tci-thaijo.org/index.php/JMND/article/view/251159