@book{50010,
	author = {Romano, Ruggiero},
	title = {Los fundamentos del mundo moderno: edad media tardía, reforma, renacimiento},
	publisher = {Siglo Veintiuno Editores, },
	year = {1999},
	series = {Historia Universal Siglo XXI},
	address = {México : },
	edition = {26a. ed.}
}