Paralee, P. ., and C. Pearkao. “Factors Predicting Overcrowding in Emergency Room of a University Hospital”. Journal of Research in Nursing-Midwifery and Health Sciences, vol. 40, no. 2, June 2020, pp. 52-65, https://he02.tci-thaijo.org/index.php/nur-psu/article/view/242768.