@book{161506,
	author = {Catholic Church},
	title = {Laborem exercens Sobre el trabajo humano en el 90o aniversario de la RERUM NOVARUM.},
	publisher = {Ediciones Paulinas},
	year = {1989.},
	series = {Documentos de la iglesia},
	address = {Bogota, Colombia},
	edition = {7a ed.}
}