Mohamed mohamed said, Sameh, Abou-bakr Mohammed Mahmoud, Dina, Gamal El-din Ali Nasser, Doaa. (2023). 'Employees Mental Health and Work Productivity: The Mediating Role of Presenteeism and Absenteeism at the governmental Hospitals in Qalyubia Governorate', المجلة العلمية للدراسات التجارية والبيئية, 14(4), pp. 413-465. doi: 10.21608/jces.2023.336595