Saragih, Roy Sahputra, and Hengki Mangiring Parulian Simarmata. “Strategi Meningkatkan Jumlah Wisatawan Ke Objek Wisata Danau Toba”. Innovative: Journal Of Social Science Research 3, no. 5 (October 8, 2023): 1123–1133. Accessed July 28, 2026. http://j-innovative.org/index.php/Innovative/article/view/4794.