ZHU, Rui. Conceptual Approaches to Integrated Unit Teaching in High School English. Frontiers in Sustainable Development, [S. l.], v. 5, n. 6, p. 48–54, 2025. DOI: 10.54691/8yegzy39. Disponível em: https://fsdjournal.org/index.php/ojs/article/view/139. Acesso em: 24 jun. 2026.