Chaivichean, A., J. Angkana, and C. Somprasert. “The Effect of a Mental Strengthening Program on the Mental Health State of High School Students”. Journal of The Royal Thai Army Nurses, vol. 24, no. 1, May 2023, pp. 143-52, https://he01.tci-thaijo.org/index.php/JRTAN/article/view/251318.