Khuzaimah, Siti, and Norma E. “Yield Bioethanol From Pineapple Skin Waste With Yeast Mass And Fermentation Time”. Jurnal Ilmiah Teknik Kimia 5, no. 2 (July 29, 2021): 104–110. Accessed July 31, 2024. https://openjournal.unpam.ac.id/index.php/JITK/article/view/10932.