Bataller Fuster, R. “Role-Plays Versus Natural Data: Asking for a Drink at a Cafeteria in Peninsular Spanish”. Íkala, Revista De Lenguaje Y Cultura, vol. 18, no. 2, Aug. 2013, pp. 111–126, https://revistas.udea.edu.co/index.php/ikala/article/view/15142.