จิตต์จำนงค์ เพ็ญทิพย์. “Volume 3 Number 1 January - June 1998”. Thai Dental Public Health Journal 3, no. 1 (June 30, 1998): 1–93. accessed September 20, 2026. https://he02.tci-thaijo.org/index.php/ThDPHJo/article/view/214348.