Gunawan , M.D. et al. 2020. Sistem Pakar Penyakit Tanaman Kopi (Coffea Sp)Metode Forward Chaining Berbasis Web. Buletin Poltanesa. 21, 1 (Jun. 2020), 26–31. DOI:https://doi.org/10.51967/tanesa.v21i1.321.