Prayoga, Boby Indra, Mahyudin Situmeang, and El Azhari. 2017. “The Role of Society in Increasing Voter Participation in Pilkada in Kab. Deli Serdang”. Proceedings of International Conference of Graduate School on Sustainability 1 (1). https://doi.org/10.26905/icgss.v1i1.1853.