Plaimee, P., Mititraporn, R., Nuangjumnong, W., Johns, N. P., & Johns, J. (2013). Comparison of Melatonin Levels, Sleep Quality and Alertness between Nurses Working Night Shift and Day Shift. Srinagarind Medical Journal, 27(4), 393–400. Retrieved from https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/11143