Wiboonkarn S, Whangmahaporn P. The Factors affecting the participation of the elderly in the operation of an elderly school in Phetchaburi Province. JHSSR [internet]. 2021 Oct. 27 [cited 2026 Sep. 11];23(2):171-85. available from: https://so05.tci-thaijo.org/index.php/hspbruacthjournal/article/view/256794