Encyclopedia of research design / 
edited by Neil J. Salkind 
 - Thousand Oaks Calif. :  SAGE Publications,  c2010. 
 - 3 v. (xxxi, 1719 p. :  ill. ;  29 cm. 
<br/><br/><label>ISBN: </label>9781412961271 
<br/><br/><label>LCCN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences<br/>Statistical methods
<br/><br/><label>LC Class. No.: </label>HA29  / .E525 2010