Sridawruang, Chaweewan, and Piyanuch Promsaka na Sakolnakorn. 2018. “Primary Care Management in best practices primary care units base on national health insurance system, region 8 Udonthani”. Nursing, Health, and Education Journal 1 (2):18-25. https://he02.tci-thaijo.org/index.php/NHEJ/article/view/159047.