Ortega, Wenceslao. <br/><br/>
Ortografía programada 
Wenceslao Ortega. 
 - 5a ed. 
 - México  McGraw Hill  2012. 
 - 230 p.  27 cm. 
<br/><br/><label>ISBN: </label>9786071506658 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Spanish language - - Orthography and spelling - - Study and teaching.