Sitorus, Rudolf, and Novi Anggriana Harahap. “Revitalization of Koek & Co Building As the Center for Automotive Modification; Hi-Tech Architecture Approach”. International Journal of Architecture and Urbanism 5, no. 3 (November 30, 2021): 303–312. Accessed February 26, 2026. https://talenta.usu.ac.id/ijau/article/view/7715.