Widyowanti, R.A., Dharmawati, N.D., Hertini, E.S. and Renjani, R.A. 2019. Karakterisasi Pelet Pupuk Organik Berbahan Slurry Limbah Cair Pabrik Kelapa Sawit Sebagai Pupuk Slow Release. Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering). 8, 3 (Sep. 2019), 187–197. DOI:https://doi.org/10.23960/jtep-l.v8i3.187-197.