Peran fraksi-fraksi DPR RI periode 2014-2019 dalam perumusan ambang batas parlemen dalam undang-undang nomor 7 tahun 2017 tentang pemilihan umum = The role of factions of the house of representatives of the republic of indonesia DPR RI of 2014-2019 period in the formulation of parliamentary thresholds in law number 7 of 2017 on general election