@book{4418,
	author = {Freud, Sigmund  and Lopez Ballesteros y de Torres, Luis },
	title = {Una Teoria Sexual  y otros ensayos / },
	publisher = {Iztaccihualt, },
	year = {s.f},
	series = {Obras completas de Freud ; },
	address = {Mexico : },
	edition = {1ª ed.}
}