Nurchayati, et al. “PENGARUH VARIASI PH DAN RAGI TERHADAP VOLUME DAN KADAR BIOETANOL DARI BAHAN MOLASE”. Energy, Materials and Product Design, vol. 2, no. 2, Nov. 2023, pp. 129-37, https://journal.unram.ac.id/index.php/empd/article/view/2847.