Soontornpas, Cheardchai, Chulaporn Limwattananon, Somsak Tiamkao, and Ratchadaporn Soontornpas. 2014. “Implementation of Internal Audit System on Non-Essential Drug Prescribing at Srinagarind Hospital”. Srinagarind Medical Journal 29 (4):150-53. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/23742.