Petlamul, M., and N. Boonkaew. “Quality of Life of the Elderly Living in Thanyaburi District, Pathum Thani Province”. Nursing Journal of The Ministry of Public Health, vol. 31, no. 2, Aug. 2021, pp. 140-51, https://he02.tci-thaijo.org/index.php/tnaph/article/view/252592.