Distance Education/  The Foundations of Effective Practice, 
John R. Verduin, Jr. 
 - San Francisco:  Jossey-Bass Publishers,  c1991. 
 - xiv,279p.  23x15cm. 
<br/><br/><label>ISBN: </label>1-55542-306-X 
<br/><br/><label>Dewey Class. No.: </label>374 VER