OMER, E. M. THE ATA SYSTEM: ITS ORIGIN, DEVELOPMENT AND SOCIO-ECONOMIC IMPACT ON THE SOCIETY OF MEDINA DURING THE ERAS OF THE RIGHTLY GUIDED CALIPHS (11-40AH/632-661AD). Journal of Al-Tamaddun, [S. l.], v. 15, n. 1, p. 109–117, 2020. DOI: 10.22452/JAT.vol15no1.7. Disponível em: https://ijie.um.edu.my/index.php/JAT/article/view/19784. Acesso em: 25 nov. 2024.