Manab, Nur Sabrina Abdul, Harumi Veny, Azziana Gusniah, Sarina Sulaiman, and Noorhaliza Aziz. “Stepwise Methanolysis of Waste Cooking Oil Using Immobilized Thermomyces Lanuginose Lipase Within Ultrasonic-Assisted Condition”. ASEAN Journal of Chemical Engineering 21, no. 1 (June 30, 2021): 19-26. Accessed July 17, 2024. https://journal.ugm.ac.id/v3/AJChE/article/view/9144.