@Book{BVMC:234368,
author = {Gracián, Baltasar},
title = {Oráculo manual y arte de prudencia},
publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 1999},
year = {1999},
url = {http://www.cervantesvirtual.com/nd/ark:/59851/bmcxs5p7}
}