Sujudi, M.A.A., Fauziah, F. and Hidayatullah, D. 2020. Expert System Certainty Factor Method in Website-Based Pest Diagnosis of Eggplant Plants: Expert System Certainty Factor Method in Website-Based Pest Diagnosis of Eggplant Plants. Jurnal Mantik. 3, 4 (Feb. 2020), 428-438.