RIZKI ALVIANA; SUWANDI; AJENG SETYORINI. The Effectiveness of Duolingo and Busuu Apps to Improve English Vocabulary Mastery The Case of Second Grade Students of Ma Yarobi Grobogan. Jurnal Ilmiah Pendidikan Holistik (JIPH), [S. l.], v. 3, n. 3, p. 179–188, 2024. DOI: 10.55927/jiph.v3i3.10818. Disponível em: https://journal.formosapublisher.org/index.php/jiph/article/view/10818. Acesso em: 23 jun. 2026.