Aljabar Relational dan Implementasi kedalam Bahasa Query dalam Perancangan Database Relational. Jurnal Kajian Ilmiah, [S. l.], v. 20, n. 2, p. 213–224, 2020. DOI: 10.31599/jki.v20i2.164. Disponível em: https://ejurnal.ubharajaya.ac.id/index.php/JKI/article/view/164.. Acesso em: 3 may. 2024.