D. N. I. Abidin, P. M. D. R. Zakaria, D. E. Aminudin, and Dodo Yakubu Aminu, SUSTAINABLE BUILDING RETROFITTING AND ENERGY EFFICIENCY. Penerbit UTHM, 2021. Accessed: Jul. 18, 2024. [Online]. Available: https://penerbit.uthm.edu.my/omp/index.php/penerbituthm/catalog/book/304