Liemsuwan, T. “Ageism of Working   –  Age in Chon Buri Province: Results of the Fraboni Scale of Ageism (FSA)©”. Journal of Liberal Arts Prince of Songkla University, vol. 11, no. 2, Dec. 2019, pp. 223-44, https://so03.tci-thaijo.org/index.php/journal-la/article/view/232790.