Suprapto, Y., S. Maarif, T. Warsito, and E. Eriyandi. “Sistem Monitoring Private Automatic Branch Exchange Dengan Tampilan Personal Computer Berbasis Wirelless”. Jurnal Penelitian, vol. 3, no. 4, Dec. 2018, pp. 52-61, doi:10.46491/jp.v3i4.118.