ถวัลย์วงศ์ศรี วีรเธียร, and ชูใหม่ อรรถยาภรณ์. “Acute Undifferentiated Fever in ThaSala District, Nakhon Si Thammarat”. Region 11 Medical Journal 31, no. 4 (December 1, 2017): 657–664. accessed September 20, 2026. https://he02.tci-thaijo.org/index.php/Reg11MedJ/article/view/172047.