@Misc{BVMC:249368,
author = {Bécquer, Gustavo Adolfo},
title = {Libro de los gorriones. Rima XXI},
publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2014},
year = {2014},
url = {http://www.cervantesvirtual.com/nd/ark:/59851/bmcsx6b8}
}