Escalona-Pardo, Eduardo, Laritza Pantoja-Tamayo, e Yusimí Frías-Reyes. 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), 41-49. https://revistas.udg.co.cu/index.php/roca/article/view/224.