Metodología de la investigación 
 Investigación 
Santiago Zorrilla Arena ... [et al.]. 
 - México  McGraw-Hill  1997. 
 - x, 164 p.  il.  23 cm. 
<br/><br/> Includes bibliography (p. [157]-158) and index. 
<br/><br/><label>ISBN: </label>9701016211 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research--Methodology.<br/>Social sciences--Research.
<br/><br/><label>Dewey Class. No.: </label>001.42  / M593