RAMADHANTI, Maskonah. The effect of utilizing package books on increasing understanding of virtual self-learning of social studies subjects. Harmoni Sosial: Jurnal Pendidikan IPS, [S. l.], v. 9, n. 1, 2022. DOI: 10.21831/hsjpi.v9i1.54675. Disponível em: https://journal.uny.ac.id/index.php/hsjpi/article/view/54675. Acesso em: 19 may. 2025.