Brata, Antarif Kusuma, Andes Ismayana, and Mohammad Yani. “Life Cycle Assessment of Vehicle Fuels on Production Proccess in Refinery Field”. Journal of Natural Resources and Environmental Management 8, no. 3 (December 17, 2018): 406-413. Accessed August 7, 2020. http://dthh.journal.ipb.ac.id/index.php/jpsl/article/view/18959.