Chuaktong, Sunisa, Chomchuen Somprasert, and Priyoth Kittiteerasack. “The Effects of a Positive-Emotion-Enhancing Program on the Happiness of the Elderly”. Journal of The Royal Thai Army Nurses 24, no. 3 (December 10, 2023): 123–132. accessed October 11, 2026. https://he01.tci-thaijo.org/index.php/JRTAN/article/view/259541.