Yayienda, Nibras, and Retno Wigajatri Purnamaningsih. “Quality Assurance of Voltage Measurement in Multifunction Calibrator As Measurement Standard in National Standardization Agency of Indonesia (SNSU – BSN) ”. Jurnal Penelitian Pendidikan IPA, vol. 8, no. 3, July 2022, pp. 1184-90, doi:10.29303/jppipa.v8i3.1467.