Sharifah Meryam Shareh Musa, Haryati Shafii, and Seow Ta Wee, ISU-ISU ALAM SEKITAR DAN KELESTARIAN. Penerbit UTHM, 2012. Accessed: Aug. 27, 2026. [Online]. Available: https://monograph.uthm.edu.my/index.php/penerbituthm/catalog/book/90