@Misc{BVMC:220669,
author = {Valera, Juan},
title = {Milagro de la dialéctica [Audio]},
publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2003},
year = {2003},
url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcqj7b4}
}