Chaiwuttisak, Pornpimol, Wariya Yangwai, Weerachai Meesat, and Supawit Somkeartvera. 2020. “Simulation of a Queuing System to Increase the Service Efficiency of Outpatient Department: A Case Study of Mueangpan Hospital, Lampang Province”. Journal of Science Ladkrabang 29 (1):10-22. https://li01.tci-thaijo.org/index.php/science_kmitl/article/view/235740.