Brace I <br/><br/>
Questionnaire design : how to plan, structure and write survey material for effective market research 
Brace I 
 - London  London, Kogan Page  2004 
 - 288p 
<br/><br/><label>ISBN: </label>0-7494-4181-X 
<br/><br/><label>Source: </label>Textbook