AFRIZAL F.A. HUTABARAT; LEONARD ROBERTO SINAGA; TALENTA MARBUN. PENGARUH KETEPATAN WAKTU PENGIRIMAN TERHADAP KEPUASAN KONSUMEN DI PT. POS INDONESIA CABANG TARUTUNG. ECOJURNAL - Jurnal Eco Unita, [S. l.], v. 3, n. 1, p. 130–133, 2024. Disponível em: https://ecojurnal.usxiitapanuli.ac.id/index.php/ej/article/view/73. Acesso em: 16 apr. 2026.