International handbook of survey methodology/ 
Leeuw, Edith d de 
 - 1st ed. 
 - New York:  Psychology Press,  2008. 
 - 549 
<br/><br/><label>ISBN: </label>9780805857528 
<br/><br/><label>Dewey Class. No.: </label>001.433  / LEE/I