“Optimisation of Production Condition of Alkaline Protease Using Indigenous Bacillus Subtilis from Agricultural Soil: Bacillus Subtilis for Protease Production”. 2018. Biological Sciences - PJSIR 61 (2): 84-88. https://doi.org/10.52763/PJSIR.BIOL.SCI.61.2.2018.84.88.