Analisis Strategi Peningkatan Kepuasan Pelanggan di PT Kereta Api Indonesia Dirve 1 Sumatera Utara. Journal of Laguna Geography, [S. l.], v. 4, n. 1, p. 26–30, 2025. DOI: 10.52562/joulage.v4i1.1538. Disponível em: https://journal.moripublishing.com/index.php/joulage/article/view/1538. Acesso em: 13 jul. 2026.