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: http://150.107.142.43/index.php/MIZAN/article/view/371. Acesso em: 12 feb. 2026.