Hidayat, N., D. Djamaludin, and M. Ridwan. “Implementasi Cloud Database Pada Perpustakaan Digital Berbasis Android Dan JS Client”. Jurnal Ilmiah Fakultas Teknik, vol. 2, no. 1, June 2021, pp. 50-56, https://ejournal.unis.ac.id/index.php/jimtek/article/view/1315.