Escalona-Pardo, E., Pantoja-Tamayo, L. e Frías-Reyes, Y. (2018) A system of language games for improving the speaking skill in tenth graders at Micaela Riera Oquendo senior high school in Manzanillo (Original), Roca. Revista científico - educacional de la provincia Granma, 14(2), p. 41-49. Disponível em: https://revistas.udg.co.cu/index.php/roca/article/view/224 (Acessado: 22novembro2019).