Jongrat, Katekanok, Srithaya Ridchuayrod, Nantawut Wongmek, and Nipon Rattanakhot. 2019. “Health Status and Quality of Life of Dependent Elderly in Thungsong Municipality, Nakhon Si Thammarat Province”. Journal of Health Science of Thailand 28 (6):1013-20. https://thaidj.org/index.php/JHS/article/view/8333.