Ounnapiruk, L., V. Wirojratana, W. Kongsuriyanavin, and W. Termsettajaroen. “The Effectiveness of a Health Promotion Program on Quality of Life of Elderly People in the Elderly Club”. Nursing Science Journal of Thailand, vol. 30, no. 2, June 2012, pp. 35-45, https://he02.tci-thaijo.org/index.php/ns/article/view/10291.