Sanghirun, M., Butnark, P., Sanghirun, K. and Sooksai, T. (2024) “Development of physical activity model of the elderly”, Interdisciplinary Research Review, 19(2). available at: https://ph02.tci-thaijo.org/index.php/jtir/article/view/249923 (accessed: 14 September 2026).