SHIVELY, R. L.; COHEN, A. D. Development of Spanish requests and apologies during study abroad. Íkala, Revista de Lenguaje y Cultura, [S. l.], v. 13, n. 2, p. 57–118, 2008. DOI: 10.17533/udea.ikala.2683. Disponível em: https://revistas.udea.edu.co/index.php/ikala/article/view/2683. Acesso em: 10 mar. 2025.