Choochom, Oraphin, Umaporn Sucaromana, Jennifer Chavanovanich, and Peter Tellegen. “Model of Self-Development for Enhancing Psychological Immunity of the Elderly”. The Journal of Behavioral Science 14, no. 1 (January 18, 2019): 84–96. Accessed April 25, 2024. https://so06.tci-thaijo.org/index.php/IJBS/article/view/129418.