MUSONNIF, Ahmad. KEBERAGAMAN SISTEM KALENDER UMAT ISLAM PERSPEKTIF TEORI DIFERENSIASI SOSIAL HERBERT SPENCER. Ahkam: Jurnal Hukum Islam, [S. l.], v. 2, n. 1, p. 4–19, 2014. DOI: 10.21274/ahkam.2014.2.1.4-19. Disponível em: https://ojstrial.uinsatu.ac.id/index.php/ahkam/article/view/678. Acesso em: 19 nov. 2025.