Perdana, N. I. H., Reno Tanfidz, Stevila, and Siti Aisyah. “Implementation of Expert System in Diagnosing Torch Disease Using The Certainty Factor Method”. Jurnal Mantik, vol. 4, no. 4, Feb. 2021, pp. 2682-6, doi:10.35335/mantik.Vol4.2021.1238.pp2682-2686.