RUDI PURNOMO. Analisis teori riba dan kegagalan sistem ekonomi kapitalisme. Opinia de Journal, [S. l.], v. 3, n. 1, p. 22–42, 2023. Disponível em: https://ejournal.stainumadiun.ac.id/index.php/opinia/article/view/75. Acesso em: 1 sep. 2025.