@book{71621,
	author = {Foot, Philippa.},
	title = {Teorias sobre la etica},
	publisher = {Fondo de Cultura Ecónomica},
	year = {1974.},
	series = {Breviarios del Fondo de Cultura Económica},
	address = {México},
	note = {Origional title: Theories of ethics.}
}