Dengmasa, S. ., T. . Srichan, A. . Pumpaka, and Y. . Sikkajan. “The Elderly’s Health Care Behaviors in the Plains and Foothills in Nakhon Si Thammarat Province”. JOURNAL OF SOUTHERN TECHNOLOGY, vol. 13, no. 2, Sept. 2020, pp. 75-83, https://so04.tci-thaijo.org/index.php/journal_sct/article/view/243055.