Babbie,Earl <br/><br/>
The practice of social research / 
Earl Babbie 
 - 9th ed. 
 -  Wadsworth,  2001 
<br/><br/><label>ISBN: </label>9780534574741 
<br/><br/><label>Subjects--Topical Terms: </label><br/>The social research
<br/><br/><label>Dewey Class. No.: </label>300.72  / BAB