วิชิต ชาญศักดิ์. “Prevalence and Associated Factors of Depression Among the Elderly Living in Phon Phisai District, Nong Khai Province”. Primary Health Care Journal (Northeastern Edition) 36, no. 1 (October 18, 2021): 24–36. Accessed November 22, 2024. https://thaidj.org/index.php/pjne/article/view/10941.