Oppemheim, A. N. <br/><br/>
Questionnaire design, interviewing and attitude measurement 

 - 2nd ed. 
 - London :  Continuum International Publishing Group,  1992 (2003. 
<br/><br/><label>ISBN: </label>0826451764 
<br/><br/><label>Dewey Class. No.: </label>001.433