F. Martono, Yacob, Rizki Setyobowo Sangalang, Ivans Januardy, and Restu Ronggo Wicaksono. “Criminal Law Review of Investment Managers Who Implement Pyramid Schemes”. Jurnal Ilmu Hukum Tambun Bungai 8, no. 1 (June 30, 2023): 271-280. Accessed November 4, 2025. https://journal.stihtb.ac.id/index.php/jihtb/article/view/241.