Web-Based Information System Management of Letter Management In University Islam Kebangsaan Indonesia (UNIKI). Jurnal Tika, indonesia, v. 7, n. 1, p. 96–103, 2022. DOI: 10.51179/tika.v7i1.1123. Disponível em: https://journal.umuslim.ac.id/index.php/tika/article/view/1123. Acesso em: 15 mar. 2026.