Sudman, Seymour. <br/><br/>
Thinking about answers :  the application of cognitive processes to survey methodology / 
Seymour Sudman, Norman M. Bradburn and Norbert Schwarz. 
 - San Francisco :  Jossey-Bass,  1996. 
 - 304 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>0787901202  RM138.52 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social surveys--Methodology.<br/>Cognition.