Dani, D.H.T.P. et al. 2024. Study of the Effect of NaOH Type Alkaline Catalyst on the Physicochemical Characteristics of Used Cooking Oil Biodiesel. Jurnal Keteknikan Pertanian. 12, 3 (Dec. 2024), 393–408. DOI:https://doi.org/10.19028/jtep.012.3.393-408.