RIAZ, Shazia; DURR-E-NAYAB. User Perceptions of Vocabulary Learning Features in Duolingo and Babbel: A Comparative Analysis of Effectiveness and User Satisfaction. Qlantic Journal of Social Sciences , [S. l.], v. 6, n. 1, p. 482–495, 2025. DOI: 10.55737/qjss.vi-i.25345. Disponível em: https://qjss.com.pk/index.php/qjss/article/view/345. Acesso em: 29 jun. 2025.