Babbie, Earl <br/><br/>
The basics of social research 
Earl Babbie 
 - 7th  Edition 
 - USA:  Cengage Learning,  2017. 
 - xxvii, 530 pages:  figures, tables;  25 cm. 
<br/><br/> Includes Index, 
<br/><br/>Includes Bibliographical References pages (499-511). 
<br/><br/><label>ISBN: </label>9781305503076 9781305677111 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--methodology.<br/>Social sciences--Research.
<br/><br/><label>Dewey Class. No.: </label>301.072  / B113b