Babbie,Earl <br/><br/>
The Practice of Social Research 

 - 13th ed. 
 - Delhi  Cengage Learning India Private Limited  2017 
 - 584 p. 
<br/><br/><label>ISBN: </label>978-81-315-2011-6 
<br/><br/><label>Subjects--Uniform Titles: </label>--Social sciences
<br/><br/><label>Dewey Class. No.: </label>300.72  / BAB-P