JEFFRIN, Ray; WAHYUNIAR, Lely. The Effect of Breathing Training in Choir Activities on Anxiety Levels in Adolescents: A Systematic Review. Jurnal Edusci, [S. l.], v. 3, n. 2, p. 233–242, 2026. DOI: 10.62885/edusci.v3i2.1041. Disponível em: https://annpublisher.org/ojs/index.php/edusci/article/view/1041. Acesso em: 7 jul. 2026.