Celik, Bunyamin, and Ömer Hakan Ölçer. “Importance of Corporate E-Mail Service for Educational Institutions”. International Journal of Social Sciences & Educational Studies 4, no. 4 (June 1, 2018): 150–160. Accessed May 15, 2025. https://ijsses.tiu.edu.iq/index.php/ijsses/article/view/395.