SUDRADJAT, A. The Development of Student Grades Information System at SDIT Using Waterfall Model. Sinkron : jurnal dan penelitian teknik informatika, [S. l.], v. 3, n. 2, p. 249-159, 2019. DOI: 10.33395/sinkron.v3i2.10049. Disponível em: https://jurnal.polgan.ac.id/index.php/sinkron/article/view/10049. Acesso em: 16 jul. 2024.