Hakim S, A. (2023) “Synthesis and Characterization of PVA-Enzyme/GA/PPy/ PVC-KTpClPB-o-NPOE Indicator Electrodes, XRD Analysis, FTIR and Variable Signal Analysis”, Jurnal Penelitian Pendidikan IPA, 9(3), pp. 1149–1154. doi: 10.29303/jppipa.v9i3.2389.