Awaludin Prihanto, A., K. D. Aninta, and S. Trisnaningrum. “Protease Production from Bacillus Sp. Isolated from Gastrointestinal Tract of Catfish (Clarias sp.) With Different Medium”. Journal of Aquaculture and Fish Health, vol. 10, no. 2, May 2021, pp. 186-91, doi:10.20473/jafh.v10i2.17606.