Bouklai, Satid. 2024. “The Development of Surgical Service in Pakthongchai Hospital by Using the Theory of Constraints”. Maharat Nakhon Ratchasima Hospital Journal 36 (1). Nakhon Ratchasima,Thailand:33-38. https://he04.tci-thaijo.org/index.php/MNRHJ/article/view/1668.