Yudantoro, Tri, Prayitno Prayitno, Budi Suyanto, Slamet Handoko, and Wahyu Sulistiyo. “SISTEM INFORMASI VIRTUAL ASSISTANT KEGIATAN PERKULIAHAN DOSEN DAN MAHASISWA”. SINTAK 2 (November 14, 2018). Accessed August 15, 2020. https://unisbank.ac.id/ojs/index.php/sintak/article/view/6603.