Teaching and learning at a distance     foundations of distance education  / 
Michael Simons...[et al.] 
 - 3a ed. 
 - New Jersey    Pearson Education,   c2006 
 - xxi; 362p.    il. 
<br/><br/> Incluye índice 
<br/><br/>Incluye referencia bibliográfica 
<br/><br/><label>ISBN: </label>0131196308 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educacion a distancia
<br/><br/><label>LC Class. No.: </label>LC5800  / .T43 2006