Dooley, David. <br/><br/>
Social research methods. 

 - 4th ed. 
 - New Delhi :  Prentice-Hall of India,  2007. 
 - xiv, 385 p. :  ill. ;  23 cm. 
<br/><br/>Includes biblographical references and index. 
<br/><br/><label>ISBN: </label>8120331192 
<br/><br/><label>Dewey Class. No.: </label>001.42 DOO