SAPUTRO, P. B. Relevansi Perjanjian Schengen Pasca Serangan Teror ISIS di Eropa Periode 2015-2016. Jurnal International & Diplomacy Universitas Satya Negara Indonesia, [S. l.], v. 2, n. 2, p. 185–216, 2017. Disponível em: https://jurnalhiusni.org/index.php/idu/article/view/138. Acesso em: 18 oct. 2025.