Babbie, Earl <br/><br/>
Introduction to social research / 
Earl Babbie 
 - 5th ed. 
 - Belmont:  Wadsworth,  2011 
 - 539 p. 
<br/><br/><label>ISBN: </label>9780840032201 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research.
<br/><br/><label>Subjects--Index Terms: </label>Khoa học xã hội Xã hội học 
<br/><br/><label>Dewey Class. No.: </label>300.72  / BAB 2011