Ferdiansyah, D., Wahyuddin, M. I., & Andrianingsih, A. (2020). Information System Development of Web Portalalumni National University: Information System Development of Web Portalalumni National University. Jurnal Mantik, 4(1), 767-772. Retrieved from https://iocscience.org/ejournal/index.php/mantik/article/view/850