Adlin, Wan Nur Afini Binti Wan, Vivien Jong Yi Mian, Ang Chung Huap, and Wen-Chien Lee. 2020. “Characterization of Biosurfactants Produced by Bacillus Subtilis Using Fresh and Waste Cooking Oil Enriched Medium”. Journal of Asian Scientific Research 10 (3):156-64. https://doi.org/10.18488/journal.2.2020.103.156.164.