Ruzaly, Efdi. “PENGARUHPEMBERIAN SLUDGE TERHADAP PERTUMBUHAN BIBIT STUMP MATA TIDUR TANAMAN KARET (Hevea Brasilensis) DI POLYBAG”. Agroprimatech, vol. 3, no. 1, Jan. 2020, pp. 68-77, https://jurnal.unprimdn.ac.id/index.php/Agroprimatech/article/view/794.