“PENGARUH PENGGUNAAN PUPUK HAYATI TERHADAP PERTUMBUHAN TANAMAN BELUM MENGHASlLKAN (TBM I) KOPI ROBUSTA (Coffea Canephora Pierre Ex Froehner)”. Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy), vol. 27, no. 2, July 2010, https://doi.org/10.24831/jai.v27i2.1576.