Mat Salleh, M. N. B., D. H. B. Ismail, and D. H. B. Mohd Yusoff. “Prevalence and Predictors for PTSD Among Firefighters. A Systematic Review”. International Journal of Public Health Research, vol. 10, no. 1, Apr. 2020, https://spaj.ukm.my/ijphr/index.php/ijphr/article/view/259.