Simanjuntak, Krisna Gerda, and Emelia Fransiska Ginting. “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 5, no. 10 (October 31, 2018). Accessed December 22, 2024. https://journal.akpardarmaagung.ac.id/index.php/JIAA/article/view/11.