SIMANJUNTAK, K. G.; GINTING, E. F. Sales Strategy of North Sumatera Inbound Tour In PT. Narasindo Medan: Strategi penjualan Sumatera Utara Inbound Tour di PT. Narasindo Medan. Jurnal Ilmiah Akomodasi Agung, [S. l.], v. 5, n. 10, 2018. Disponível em: https://journal.akpardarmaagung.ac.id/index.php/JIAA/article/view/11. Acesso em: 21 jan. 2026.