Saputro, P. B. (2017). Relevansi Perjanjian Schengen Pasca Serangan Teror ISIS di Eropa Periode 2015-2016. Jurnal International & Diplomacy Universitas Satya Negara Indonesia, 2(2), 185–216. Retrieved from https://jurnalhiusni.org/index.php/idu/article/view/138