Earl  Babbie <br/><br/>
Survey Research methods  

 - 2nd ed 
 - Belmont , California  Wadsworth Publishing  1998 
 - xvi,367p.: ill.,23cm. 
<br/><br/><label>ISBN: </label>0-534-12672-3 
<br/><br/><label>LC Class. No.: </label>300.723 BAB 
<br/><br/><label>Dewey Class. No.: </label>300.723 BAB