Clark, Ruth Colvin. , <br/><br/>
Efficiency in learning :  evidence-based guidelines to manage cognitive load / 
Ruth Colvin Clark, Frank Nguyen, John Sweller. 
 - 390 pages :  illustrations ;  25 cm.+  1 computer optical disc (4 3/4 in.). 
<br/><br/><label>ISBN: </label>0787977284 9780787977283 
<br/><br/><label>LC Class. No.: </label>HD58.82   / .C52 2006