Hardyansa, H. “Comparison of Electrolyte Examination Using Ion Selective Electrode Method on Serum Samples Immediately and Delayed 8 Hours”. Jurnal Ilmiah Kesehatan Sandi Husada, Vol. 12, no. 1, June 2023, pp. 299-04, doi:10.35816/jiskh.v12i1.1182.