Encyclopedia of distance learning 
Patricia Rogers ... [et al.], editors 
 - 2nd ed 
 - Hershey, PA  Information Science Reference  2009 
 - 4 v. : ill. ; 29 cm 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781605661988 
<br/><br/><label>ISSN: </label>2008042438 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Distance education - Encyclopedias
<br/><br/><label>Dewey Class. No.: </label>371.3503 ROG.3