UTAMI, W.; SYA, M. F.; HIDAYAT, A. Developing English learning material for grade 4 students. LADU: Journal of Languages and Education, Jawa Barat, Indonesia, v. 2, n. 6, p. 231–240, 2022. DOI: 10.56724/ladu.v2i6.144. Disponível em: https://alejournal.com/index.php/ladu/article/view/144. Acesso em: 6 jul. 2025.