พรกาญจนวงศ์ พรสวรรค์. “District Health System Operation Model Health Zone 12 of Years 2015 – 2017”. Region 11 Medical Journal 33, no. 1 (March 1, 2019): 59–72. accessed September 20, 2026. https://he02.tci-thaijo.org/index.php/Reg11MedJ/article/view/188287.