Thorpe, Mary <br/><br/>
Evaluating open and distance learning / 
by Mary Thorpe 
 - Harlow, Essex :  Longman,  1988 
 - Longman open learning .
<br/><br/>References : p. 205-208 
<br/><br/><label>ISBN: </label>0582901197 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Distance education--Evaluation<br/>Open learning--Evaluation