Soponnark, A., P. Sealim, and W. Saisit. “Lifestyle of Healthy Elders Aged 80 Years and Over”. Journal of The Royal Thai Army Nurses, vol. 27, no. 1, Apr. 2026, pp. 140-8, https://he01.tci-thaijo.org/index.php/JRTAN/article/view/280779.