“Perbandingan Karakteristik Biodiesel Berbahan Baku Minyak Jelantah Hasil Proses Transesterifikasi Berkatalis NaOH, CaO Superbasa, Dan Zeolit”. 2019. Journal of Chemical Process Engineering 4 (1): 1-6. https://doi.org/10.33536/jcpe.v4i1.831.