N. Waiwitriyakul, N. saraboon, J. Sirisin, and A. Jitcharerntham, “Depression and Associated Factors Among Older Adults in Phang Khon District, Sakon Nakhon Province”, NJPH (วารสาร พ.ส.), vol. 36, no. 2, pp. 33–46, Aug. 2026.