AlMetrek, Metrek Ali S, Mohammed Y. Khan, Amani Othman, and Moataz Abdel- Fattah. 2015. “Effect of Shift-Work on Sleeping Quality of Male Factory Workers in Aseer Industrial Area, Khamis Mushayte, KSA”. Asian Journal of Medical Research 5 (1), 5-11. https://aijournals.com/index.php/ajmr/article/view/148.