Seputro, James Surya, and Henny Hartono. “Perancangan Sistem Informasi Akademik Berbasis Android (Studi Kasus: Bimbingan Belajar Blessing)”. Prosiding Seminar Nasional Teknoka 4 (January 7, 2020): I11-I18. Accessed September 28, 2021. https://journal.uhamka.ac.id/index.php/teknoka/article/view/4262.