Vergara-Cabarcas, L. «Role Play and Discussion Questions As Strategies to Improve the Speaking Skill in Tourism and Languages Students at Institution Tecnológica Colegio Mayor De Bolívar». REVISTA ADELANTE-AHEAD, vol. 6, n.º 3, septiembre de 2017, http://ojs.unicolombo.edu.co/index.php/adelante-ahead/article/view/103.