ANDI SUWARNI; NURASIA NATSIR. The Effectiveness of Project-Based Collaborative Learning in Improving English Speaking Skills of High School Students. International Journal of Educational Research, [S. l.], v. 1, n. 4, p. 87–101, 2024. DOI: 10.62951/ijer.v1i4.283. Disponível em: https://international.aripi.or.id/index.php/IJER/article/view/283. Acesso em: 15 jun. 2025.