EFENDY, V.; NUGRAHA, K. A.; SEBASTIAN, D. Implementasi Chat Room dan Push Notification pada e-Class Berbasis Mobile. Jurnal Teknik Informatika dan Sistem Informasi, Jakarta, Indonesia, v. 5, n. 2, 2019. DOI: 10.28932/jutisi.v5i2.1763. Disponível em: https://journal.maranatha.edu/index.php/jutisi/article/view/1763. Acesso em: 27 may. 2024.