Syahril MAF, Hasan H. A Comparative Research on the Effectiveness of Progressive versus Proportional Tax Systems in Enhancing Social Justice. Admin Env Law Rev [Internet]. 2024Oct.11 [cited 2025Sep.5];5(2):97-106. Available from: https://jurnal.fh.unila.ac.id/index.php/aelr/article/view/3479