DURU, E.; BALKIS, M.; DURU, S. The Hopelessness and Helplessness Scale: Validity and measurement invariance. Journal of Happiness and Health, [S. l.], v. 6, n. 1, p. 25–33, 2025. DOI: 10.47602/johah.v6i1.142. Disponível em: https://mail.journalofhappinessandhealth.com/index.php/johah/article/view/142. Acesso em: 17 apr. 2026.