@book{4192,
	author = {Ortega, Wenceslao. and Franco García, Germán.},
	title = {Ortografía programada / },
	publisher = {McGraw-Hill, },
	year = {1977.},
	address = {Bogotá : },
	edition = {3. ed.},
	note = {Ejercicios al final de cada capítulo.}
}