Cover Belakang Jana Utama DOI: https://doi.org/10.34010/telekontran.v6i2.3803 PDF Published 2018-10-25 Issue Vol 6 No 2 (2018): TELEKONTRAN Vol 6 No 2 Oktober 2018 Section Black Matter This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International license.