Tarida Savana, Raisza. 2018. “ANALISIS KOMPOSISI UNSUR PUPUK LEPAS LAMBAT KITOSAN-SILIKA-GLUTARALDEHIDELEMENT COMPOSITION ANALYSIS CHITOSAN-SILICA-GLUTARALDEHYDE SLOW RELEASE FERTILIZER”. Unesa Journal of Chemistry 7 (1). https://doi.org/10.26740/ujc.v7n1.p%p.