Nainggolan, B. 2017. MARKET TYPOLOGY, CONCENTRATION, AND COMPETITION OF NATIONAL MEDIA CONGLOMERATE IN INDONESIA. Jurnal Komunikasi Ikatan Sarjana Komunikasi Indonesia. 2, 1 (Jun. 2017), 27–32. DOI:https://doi.org/10.25008/jkiski.v2i1.89.