Bunthan, W., K. Nuntaboot, and W. Sritanyarat. “Leadership Development of Older Persons in Community Health Promotion”. Ramathibodi Nursing Journal, vol. 24, no. 2, Oct. 2018, pp. 178-95, https://he02.tci-thaijo.org/index.php/RNJ/article/view/103120.