Panyasai, Touchnakorn, Songpol Tornee, and Kaysorn Sumpowthong. 2014. “The mental health promotion evaluation form for depressive prevention in elderly in Chiang Rai”. Journal of Medicine and Health Sciences 21 (3):47-54. https://he01.tci-thaijo.org/index.php/jmhs/article/view/58659.