Gunawan , Mohammad Denny, Annafi’ Franz, and Riama Rita Manullang. 2020. “Sistem Pakar Penyakit Tanaman Kopi (Coffea Sp)Metode Forward Chaining Berbasis Web”. Buletin Poltanesa 21 (1):26-31. https://doi.org/10.51967/tanesa.v21i1.321.