Sumretphol, Supitcha, and Prathurng Hongsranagon. “Knowledge and Attitude Toward the Selection of Health Insurance Type After Retirement in Ratchaburi Province, Thailand”. Journal of Health Research 30, no. Suppl. 2 (March 23, 2017): S99-S105. Accessed July 3, 2022. https://he01.tci-thaijo.org/index.php/jhealthres/article/view/80728.