Gultom, Maidin. 2019. “Existence of Justice Collaborator in Criminal Action of Corruption: Decree Number 84 / Pid.Sus.TPK / 2018 / Pn. Medan, Indonesia”. The International Journal of Humanities & Social Studies 7 (2). https://doi.org/10.24940/theijhss/2019/v7/i2/HS1902-017.