@book{144124,
	author = {Gutiérrez Sáenz, Raúl.},
	title = {Introducción a la ética},
	publisher = {Editorial Esfinge},
	year = {c1988.},
	address = {Naucalpan, México},
	edition = {20a ed.},
	note = {1st ed. published in 1968.}
}