Nur IzieAdiana Abidin, Rozana Zakaria, and Dodo Yakubu Aminu, Sustainable Building Retrofitting and Energy Efficiency. Penerbit UTHM, 2021. Accessed: Apr. 09, 2026. [Online]. Available: https://penerbit.uthm.edu.my/omp/index.php/penerbituthm/catalog/book/350