Putri, Sindy Yulia, and Yosua Saut Marulitua Gultom. “Kemunduran Western European Union Dalam Arsitektur Keamanan Eropa”. Jurnal Ilmiah Wahana Pendidikan 9, no. 11 (June 30, 2023): 617-623. Accessed July 22, 2026. https://www.jurnal.peneliti.net/index.php/JIWP/article/view/4240.