Pangsiri, Mujjalin, and Civilaiz Wanaratwichit. 2020. “The Preparation for Active Aging Among Pre-Aging Population”. Journal of Phrapokklao Nursing College, Chanthaburi 31 (2). Chanthaburi, Thailand:213–223. https://he01.tci-thaijo.org/index.php/pnc/article/view/245399.