Prabowo, R.U. 2020. Kajian Ekonomi Melalui Pendekatan Kontribusi Komoditas Kopi Terhadap Perekonomian Provinsi Jawa Timur. Agropross : National Conference Proceedings of Agriculture. 4, (Agu 2020), 115–125. DOI:https://doi.org/10.25047/agropross.2020.43.