Huangkit, S., and P. Woraphatthirakul. “ROLE OF PRIVATE PRIMARY SECTOR IN PROVIDING SERVICES FOR THE AGING SOCIETY IN BANGKOK METROPOLITAN ADMINISTRATION AREAS”. Journal of Buddhist Anthropology, vol. 6, no. 1, Jan. 2021, pp. 363-78, https://so04.tci-thaijo.org/index.php/JSBA/article/view/247049.