Babbie, Earl R. <br/><br/>
The Practice of social research / 
Earl R. Babbie 
 - 13th ed. 
 - Belmont, CA :  Wadsworth Cengage Learning,  2013 
 - xxiii, 584 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references (p. 563-575) and index 
<br/><br/><label>ISBN: </label>9781133049791 (student ed.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research<br/>Social sciences--Methodology