Iwan Sahat Maruli Simanjuntak, Erniyanti, Dahlan. LEGAL ANALYSIS OF THE IMPACT OF SINGAPORE’S VISA-FREE VISIT (BVK) AND PERMANENT RESIDENCE (PR) POLICIES ON THE SECURITY AND ECONOMIC STABILITY OF BATAM CITY (A RESEARCH STUDY IN BATAM CITY). IJSET [Internet]. 2025 Sep. 8 [cited 2025 Sep. 11];4(8):3302-1. Available from: https://ijset.org/index.php/ijset/article/view/1137