@book{1815,
	author = {Descartes, Renè},
	title = {Discurso del método},
	publisher = {Editorial Universitaria, Universidad de Puerto Rico},
	year = {1967.},
	series = {Biblioteca de cultura básica},
	address = {Río Piedras, P.R.},
	edition = {5. ed.},
	note = {French and Spanish.}
}