Klomjit, Prachuab, Chanpen Anurattananon, Dararat Kaewsonthi, and Supitchaya Ngamruen. 2018. “An Application of the Hospital Unit Cost by Categorizing Disease Groups in the Sample Hospital”. Thai Industrial Engineering Network Journal 4 (1):59-66. https://ph02.tci-thaijo.org/index.php/ienj/article/view/176741.