Sihombing, J.L. et al. 2017. Conversion of avocado seed oil into liquid fuel fraction through catalytic cracking process using CuO/ZAA catalyst. Jurnal Pendidikan Kimia. 9, 2 (Aug. 2017), 304–310. DOI:https://doi.org/10.24114/jpkim.v9i2.7619.