หอมกลิ่น ฐ. “Quality of life of the Elderly in Thayang Sub-District Municipality Thayang District, Phetchaburi Province”. Research and Development Journal, Loei Rajabhat University, vol. 14, no. 49, Jan. 2020, pp. 85-93, https://so05.tci-thaijo.org/index.php/researchjournal-lru/article/view/148039.