แซ่ลิ่ม ส. (2019) “Prevalence and Associated Factors of Depression in the Elderly in Muang district , Ranong Province”, Region 11 Medical Journal, 33(1), pp. 193–202. available at: https://he02.tci-thaijo.org/index.php/Reg11MedJ/article/view/191737 (accessed: 20 September 2026).