PHUTTAJORN, A. DEVELOPMENT OF THE LIFE QUALITY OF THE ELDERLY PEOPLE BY THE SENIOR SCHOOL COURSE, NAPHU SUBDISTRICT, PHEN DISTRICT, UDON THANI. Journal of MCU Nakhondhat, Nakhon Si Thammarat, Thailand, v. 8, n. 3, p. 250–263, 2021. Disponível em: https://so03.tci-thaijo.org/index.php/JMND/article/view/251165. Acesso em: 29 nov. 2022.