Teaching and learning at a distance :  foundations of distance education / 
Michael Simonson ... [et al.]. 
 - 5th ed. 
 - Boston, Mass. :  Pearson,  2012. 
 - xxiv, 383 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>9780132487313 (pbk.)  RM216.00 0132487314 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Distance education.