Muhammad Rizki, Fitri, E., Syukri Arief, Rahadian Zainul and Syukri (2024) “Synthesis of Kaolinite Nanotubes as Heterogeneous Catalysts for Transesterification Reaction of Waste Cooking Oil into Biodiesel”, EKSAKTA: Berkala Ilmiah Bidang MIPA, 25(04), pp. 412-423. doi: 10.24036/eksakta/vol25-iss04/545.