@book{22083,
	author = {Pérez Galdós, Benito, and Gómez de la Serna, Ramón},
	title = {Tristana; Nazarín  /},
	publisher = {Porrúa, },
	year = {2000.},
	series = {Sepan cuantos...; },
	address = {México  },
	edition = {4a ed}
}