ABOOD, M. H.; GHBARI, T. A. The Existential Vacuum and Its Relationship to Pessimism and Optimism among Undergraduate Students . Islamic Guidance and Counseling Journal, [S. l.], v. 7, n. 2, 2024. DOI: 10.25217/0020247487500. Disponível em: https://journal.iaimnumetrolampung.ac.id/index.php/igcj/article/view/4875. Acesso em: 31 jul. 2025.