สัมฤทธิ์มโนพร สันติ. 2023. “EFFECTIVENESS OF COVID-19 VACCINE SANAMCHAIKHET DISTRICT CHACHOENGSAO PROVINCE”. Primary Health Care Journal (Northeastern Edition) 38 (2). Khon Kaen, Thailand:104-12. https://thaidj.org/index.php/pjne/article/view/14562.