SONIA KHODABAKHSH. EFFECTS OF HAPPINESS TRAINING ON MENTAL HEALTH IN ADULTS: A SYSTEMATIC REVIEW. INTERNATIONAL JOURNAL OF EDUCATION, PSYCHOLOGY AND COUNSELLING (IJEPC), [S. l.], v. 6, n. 38, 2024. Disponível em: https://gaexcellence.com/ijepc/article/view/3238. Acesso em: 25 may. 2025.