Encyclopedia of research design / 
edited by Neil J. Salkind 
 - Thousand Oaks, Calif. :  SAGE Publications,  2010 
 - 3 v. (xxxi, 1,719 p.) :  ill ;  29 cm 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781412961271 (hbk.)  RM1224.86 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Statistical methods--Encyclopedias<br/>Social sciences--Research--Methodology--Encyclopedias