Sipahutar, Lara Santi Hemat, et al. “Isolation and Identification of Biosurfactant-Producing Bacteria in An-Aerobic Palm Oil Waste Pools at PT. Aek Loba Plantation”. Jurnal Biologi Tropis, vol. 24, no. 1, Jan. 2024, pp. 141-53, doi:10.29303/jbt.v24i1.6423.