Sirait, H. and Lumban Raja, H. d. . . (2021) “Incoming And Outgoing Mail Filing Information System Using The View Controller Model At College Institutions”, Jurnal Mantik, 5(3), pp. 1625-1635. Available at: https://iocscience.org/ejournal/index.php/mantik/article/view/1559 (Accessed: 12September2026).