Asri, Ikhwan, and Ramhuzaini Abd Rahman. “Energy Audit and Energy Efficiency Improvement Proposal for Pejabat Pembangunan Dan Penyenggaraan (PPP), UTHM”. Research Progress in Mechanical and Manufacturing Engineering 7, no. 1 (May 26, 2026): 171–179. Accessed August 14, 2026. https://periodical.uthm.edu.my/index.php/rpmme/article/view/22168.