Montalvo Martel, Merlyn, y Yanely Peñate Ramírez. Teaching Strategy to Develop Sociolinguistic Competence in 1st Year at Cienfuegos University. Revista Conrado 15, no. 67 (marzo 20, 2019): 158-164. Accedido febrero 25, 2020. https://conrado.ucf.edu.cu/index.php/conrado/article/view/936.