@book{4,
	author = {Villegas, Abelardo and Unión de Universidades de América Latina. and Villegas, Abelardo},
	title = {La universidad en la encrucijada / },
	publisher = {UDUAL, },
	year = {1992},
	series = {(Colección UDUAL ; },
	address = {México : },
	edition = {Primera edición. },
	url = {http://dspaceudual.org/handle/Rep-UDUAL/10}
}