Yaacob, Safar, Norlaila Mazura Hj. Mohaiyadin, Alinda Samsuri, and Noor Azilah Mohd Kasim. “The Usage of Biogas As a Renewable Energy and Its Impact on Environment in Malaysia”. International Journal of Engineering & Technology 7, no. 4.28 (November 30, 2018): 1537–1539. Accessed November 25, 2024. https://sciencepubco.com/index.php/ijet/article/view/28487.