Duga, N. D. F., P. E. A. Imperial, A. N. Soriano, dan A. D. Nieva. Packed Bed Biosorption of Lead and Copper Ions Using Sugarcane Bagasse. Vol. 16, no. 1, Juni 2016, hlm. 23-37, https://jurnal.ugm.ac.id/v3/AJChE/article/view/8905.