Cheosothorn, Anchalee, Pongpan Kirdpitak, and Runjuan Khamvajarapitak. “The Development of Self-Direction Model to Enhance Life Happiness of Older Adults in Bangkok Metropolitan”. Journal of health and health management 10, no. 1 (June 29, 2024): 87–99. accessed January 8, 2026. https://he01.tci-thaijo.org/index.php/slc/article/view/268163.