Ramli, Suzana, Aminuddin Mohd Baki, Muhamad Azmi Ayub, Suhaimi Abdul Talib, Ramlah Mohd Tajuddin, Ismail Atan, Jurina Jaafar, and Nur Aziafwani Abdullah. “Renewable Energy from Biogas Generated by Sewage Sludge – Relationship Between Sludge Volume and Power Generated”. Scientific Research Journal 5, no. 2 (December 31, 2008): 1–9. Accessed November 24, 2024. https://journal.uitm.edu.my/ojs/index.php/SRJ/article/view/3414.