Kessuwanrak, Rassami. “Activity-Based Costing of Dental Cone Beam Computed Tomography Service in Institute of Dentistry, Department of Medical Services in Fiscal Year 2020”. Journal of The Department of Medical Services 46, no. 2 (September 3, 2021): 139–144. Accessed September 26, 2022. https://he02.tci-thaijo.org/index.php/JDMS/article/view/253584.