Informal Traffic Controller: Study on Shadow Economy in Indonesia. Signifikan: Jurnal Ilmu Ekonomi, [S. l.], v. 12, n. 2, p. 399–412, 2024. DOI: 10.15408/sjie.v12i2.33434. Disponível em: https://journal.uinjkt.ac.id/signifikan/article/view/33434. Acesso em: 19 feb. 2026.