Nasution, Rafika Hilmi. “The Ecological Aspects of Urban Structure of Balige District Kabupaten Toba, Indonesia”. International Journal of Architecture and Urbanism 5, no. 3 (November 30, 2021): 283–292. Accessed August 4, 2025. https://idjpcr.usu.ac.id/ijau/article/view/7427.