ACOSTA-MANZANO, I. Adult students’ perceptions on positive and ambivalent emotions during foreign language learning. Porta Linguarum An International Journal of Foreign Language Teaching and Learning, Granada, Spain, n. 36, p. 43–64, 2021. DOI: 10.30827/portalin.vi36.15630. Disponível em: https://revistaseug.ugr.es/index.php/portalin/article/view/15630. Acesso em: 22 jan. 2026.