Nur IzieAdiana Abidin, Rozana Zakaria, and Dodo Yakubu Aminu, Sustainable Building Retrofitting and Energy Efficiency. Penerbit UTHM, 2021. Accessed: Mar. 12, 2026. [Online]. Available: https://publisher.uthm.edu.my/omp/index.php/penerbituthm/catalog/book/350