Vaus,  de D. <br/><br/>
Surveys in social research: 
David de   Vaus 
 - 5th  
 - Australia  Routledge:  2002. 
 - xviii,380p.:  ill,:  25 cm 
<br/><br/> includes bibliographical references  and index 
<br/><br/><label>ISBN: </label>0415268575 
<br/><br/><label>LC Class. No.: </label>DUCE HN29.D454