SIRITED P, Thammaseeha N. Self-Efficacy Theory and Self-Healthcare Behavior of the Elderly. J Royal Thai Army Nurses [internet]. 2019 Aug. 21 [cited 2026 Sep. 28];20(2):58-65. available from: https://he01.tci-thaijo.org/index.php/JRTAN/article/view/185482