Chansiri, Decha, Weerachai Singkha, and Songsit Sonrod. “Development of Environment to Increase Effectiveness for Elderly Workers in the Workplace”. Rajamangala University of Technology Tawan-ok Social Science Journal 9, no. 1 (June 25, 2020): 50–59. Accessed May 2, 2024. https://so05.tci-thaijo.org/index.php/SocialJournal2rmutto/article/view/243499.