Siregar, Sediati, and Mbina Pinem. “Potensi Objek Wisata Kabupaten Dairi”. JURNAL GEOGRAFI 4, no. 1 (February 1, 2012): 67–79. Accessed January 1, 2026. https://jurnal.unimed.ac.id/2012/index.php/geo/article/view/7929.