Sumatri, I., Hadiyanto, H., Suherman, S. dan Christwardana, M. (2023) “Production of Biodiesel Using Enzymatic Esterification of Multi-Feedstock Oils”, 23(2), hlm. 194-209. Tersedia pada: https://journal.ugm.ac.id/v3/AJChE/article/view/9745 (Diakses: 7Juni2025).