AULIA, G. R. SISTEM OPERASIONAL KOPERASI LANGIT BIRU DALAM PERSPEKTIF HUKUM POSITIF DAN HUKUM ISLAM. MIZAN: JOURNAL OF ISLAMIC LAW , [S. l.], v. 1, n. 1, p. 17–36, 2013. DOI: 10.32832/mizan.v1i1.371. Disponível em: https://ejournal.uika-bogor.ac.id/index.php/MIZAN/article/view/371. Acesso em: 5 dec. 2025.