Pratiwi, A. M., S. Musdalifah, and D. Lusiyanti. “Peramalan Harga Emas Menggunakan Metode Average Based And Fuzzy Logic Relationship”. JURNAL ILMIAH MATEMATIKA DAN TERAPAN, Vol. 18, no. 2, Dec. 2021, pp. 230 -42, doi:10.22487/2540766X.2021.v18.i2.15712.