Poba, Detris, Ijirana Ijirana, and Jamaludin Sakung. 2019. “Crude Bromelain Enzyme Activities Based on Maturity Level of Pineapple”. Jurnal Akademika Kimia 8 (4). Palu, Sulawesi Tengah - INDONESIA:236-41. https://doi.org/10.22487/j24775185.2019.v8.i4.pp236-241.