Teaching and learning at a distance :  foundations of distance education / 
Michael Simonson, Sharon Smaldino, Susan Zvacek 
 - Sixth edition 
 - xxii, 327 páginas 
<br/><br/><label>ISBN: </label>9781623967987 (rústica) 9781623967994 (encuadernado) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educación a distancia
<br/><br/><label>LC Class. No.: </label>LC5800  / T435 2014 
<br/><br/><label>Dewey Class. No.: </label>371.35