E-OFFICE SYSTEM SMA NEGERI 4 TUALANG KABUPATEN SIAK MENGGUNAKAN METODE ALPHABETICAL AND CHRONOLOGICAL FILLING SYSTEM. ZONAsi: Jurnal Sistem Informasi, [S. l.], v. 4, p. 59–69, 2023. DOI: 10.31849/zn.v4i.12600. Disponível em: https://journal.unilak.ac.id/index.php/zn/article/view/12600. Acesso em: 17 jan. 2026.