@book{57,
	author = {Stallings, William.},
	title = {Sistemas operativos :},
	publisher = {Pearson Educación,},
	year = {2005.},
	address = {Madrid :},
	edition = {5a. ed.},
	url = {https://isae.metabiblioteca.org/cgi-bin/koha/opac-retrieve-file.pl?id=2569b0b707ef9ec1a2c242c95b36c0db}
}