Teaching and learning at a distance :  foundations of distance education / 
Michael Simonson ... [et al.] 
 - 5th ed. 
 - Boston, MA :  Pearson,  c2012. 
 - xxiv, 383 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>9780132487313 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Distance education.
<br/><br/><label>Dewey Class. No.: </label>371.35  / TEA 2012