Hernández Sampieri, Roberto. <br/><br/>
Metodología de la investigación 
Roberto Hernández Sampieri, Carlos Fernández Collado, Pilar Baptista Lucio. 
 - 5th ed. 
 - México  McGraw-Hill  c2010. 
 - xxviii, 613 p.  ill.  24 cm.  1 CD-ROM (4 3/4 in.). 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9786071502919 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research--Methodology.<br/>Cd Rom--AreciboLibrary.<br/>Social sciences--Research.