Babbie, Earl <br/><br/>
The practice of social research 
by Earl Babbie 
 - Ed.11 
 - USA  Wadsworth Cengage Learning  2007 
 - 511 p. 
<br/><br/><label>ISBN: </label>9780495187387  895 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PHD<br/>Research
<br/><br/><label>Dewey Class. No.: </label>300.72  / BAB(PRA)