EFENDI, Erwan; LUTHFIAH, Hany Tasya; SAIFULLOH, Yusuf; YUSUF, Fardika. Konsep Sistem Dalam Islam. Jurnal Pendidikan dan Konseling (JPDK), [S. l.], v. 5, n. 2, p. 3219–3225, 2023. DOI: 10.31004/jpdk.v5i2.13877. Disponível em: https://journal.universitaspahlawan.ac.id/index.php/jpdk/article/view/13877. Acesso em: 15 dec. 2025.