Sitorus, Rudolf, and Novi Anggriana Harahap. “Revitalization of Koek &Amp; 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 August 5, 2025. https://idjpcr.usu.ac.id/ijau/article/view/7715.