Callegaro, Mario <br/><br/>
Web survey methodology 

 - London:  Sage Publications Ltd.,  2015. 
 - xx, 318 p. 
<br/><br/><label>ISBN: </label>9780857028617 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Internet surveys<br/>Social sciences Research Methodology
<br/><br/><label>Dewey Class. No.: </label>001.433 CAL