Singleton, Royce A. <br/><br/>
Approaches to social research. 

 - 4th ed. 
 - New York :  Oxford,  c2005. 
 - xviii, 622p :  ill. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780195147940 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research.<br/>Social sciences.