ABOOD, Mohammed H.; GHBARI, Thaer 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://igcjournal.com/index.php/home/article/view/214. Acesso em: 16 oct. 2026.