Sirivirotjanakul, T., and K. Netklang. “Guidelines for Managing Stress in Working of School Administrators under Chaiyaphum Primary Educational Service Area Office 3”. Ratchaphruek Journal, vol. 19, no. 1, Apr. 2021, pp. 58-66, https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/247042.