D. INDRAWATI, “PENGARUH PERBANDINGAN KOMPOSISI KITOSAN DAN SILIKA TERHADAP KARAKTERISASI ADSORBEN KITOSA-SILIKA BEAD (EFFECT OF CHITOSAN AND SILICA COMPOSITION TO CHARACTERIZATION OF CHITOSAN-SILICA BEAD ADSORBENT)”, UJC, vol. 2, no. 1, Jan. 2013.