Hasibuan, Abdul Aziz, Agung Triayudi, and Ratih Titi Komala Sari. 2020. “Designing Information System Of Social Media Alumni National University Based On Website: Designing Information System Of Social Media Alumni National University Based On Website”. Jurnal Mantik 4 (1):701-8. https://iocscience.org/ejournal/index.php/mantik/article/view/796.