Olapiriyakul, Sun, and Tawanchai Phohom. 2017. “Simulation Modeling and Analysis of the Outpatient Clinic of the College of Medicine and Public Health, Ubon Ratchathani University”. Asia-Pacific Journal of Science and Technology 19 (1):82-91. https://so01.tci-thaijo.org/index.php/APST/article/view/82901.