Babbie, Earl R. <br/><br/>
The basics of social research / 
Earl Babbie. 
 - 4th ed. 
 - Belmont, CA :  Thomson/Wadsworth,  c2008. 
 - xxiv, 550 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references (p. 497-534) and index. 
<br/><br/><label>ISBN: </label>0495094684 (pbk.) 9780495094685 (pbk.) 
<br/><br/><label>LCCN: </label>2006-938498 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research.<br/>Social sciences--Methodology.