Chumpeeruang, Sirirut, Wongsiri Jampha, and Warunee Chaigchin. “Factors influencing mental health of the elderly living in Muang Nakhon Sawan Province”. Journal of Medical and Public Health Region 4 15, no. 1 (March 14, 2025): 31–44. accessed October 8, 2026. https://he01.tci-thaijo.org/index.php/JMPH4/article/view/263510.