Babbie, Earl R. <br/><br/>
The practice of social research / 
Earl R. Babbie 
 - 14th ed. 
 - Boston, MA :  Cengage Learning,  2016 
 - xxiv, 566 p. :  col. ill. ;  26 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781305104945 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research<br/>Social sciences--Methodology