ANALYSIS OF THE EFFECTIVENESS OF THE DUOLINGO APPLICATION IN ENHANCING ENGLISH SKILLS OF ELEMENTARY SCHOOL STUDENTS: A SYSTEMATIC LITERATURE REVIEW. EXPOSURE : JURNAL PENDIDIKAN BAHASA INGGRIS, [S. l.], v. 14, n. 2, p. 477–490, 2025. DOI: 10.26618/6cnbdd20. Disponível em: https://journal.unismuh.ac.id/index.php/exposure/article/view/17889. Acesso em: 3 dec. 2025.