Ramli, S. ., Mohd Baki, A. ., Ayub, M. A. ., Abdul Talib, S. ., Mohd Tajuddin, R. ., Atan, I. ., Jaafar, J. ., & Abdullah, N. A. . (2008). Renewable Energy from Biogas Generated by Sewage Sludge – Relationship between Sludge Volume and Power Generated. Scientific Research Journal, 5(2), 1–9. https://doi.org/10.24191/srj.v5i2.5641