KETVERAPONG, P. . Development of Savings and Career Patented of the Elderly for Sustainable Living in the Upper North. Journal of Thammawat, [S. l.], v. 1, n. 1, p. 39–48, 2020. Disponível em: https://so09.tci-thaijo.org/index.php/tmwj/article/view/590. Acesso em: 8 apr. 2025.