SARAH, Nani Nuraini. PERAN OPERATOR TELEPON PADA LAYANAN PESAN ANTAR. Jurnal Sekretari Universitas Pamulang, [S. l.], v. 2, n. 1, p. 10, 2017. DOI: 10.32493/skr.v2i1.623. Disponível em: https://openjournal.unpam.ac.id/index.php/Sekretaris/article/view/623. Acesso em: 23 dec. 2024.