Tjiptohadi Sawarjuwono, Rahmad Hakim, y Ahmad Djalaluddin. «Proposing the Value of Amanah As the Foundation of Zakah Organizational Culture». Opción 350 (agosto 13, 2019): 20-36. Accedido julio 12, 2025. https://mail.produccioncientificaluz.org/index.php/opcion/article/view/24682.