GAFUR, Abdul. Konsep, prinsip, dan prosedur pengembangan modul sebagai bahan ajar. Jurnal Civics: Media Kajian Kewarganegaraan, [S. l.], v. 7, n. 1, 2010. DOI: 10.21831/civics.v7i1.3445. Disponível em: https://journal.uny.ac.id/index.php/civics/article/view/3445. Acesso em: 17 may. 2025.