Survey methodology 
Robert M. Groves ...[et al.]. 
 - 2nd ed. 
 - New Jersey  John Wiley & Sons  2009 
 - xxi, 461 p. 
<br/><br/><label>ISBN: </label>0470465462 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Surveys--Methodology<br/>Social surveys--Methodology<br/>Social sciences--Research--Statistical methods
<br/><br/><label>LC Class. No.: </label>HA31.2  / .S87 2009 c. 1