Sootinan-ophat, Rungnapa, Sriprapai Inchaithep, and Wasana Mangkhang. “The Factors Analysis of Bullying Scale for Students in Secondary School”. Journal of Nurses Association of Thailand Northern Office 26, no. 1 (June 30, 2020): 13–26. Accessed March 28, 2024. https://he01.tci-thaijo.org/index.php/jnorthnurse/article/view/223457.