Clark, Ruth Colvin. <br/><br/>
E-learning and the science of instruction :  proven guidelines for consumers and designers of multimedia learning / 
Ruth Colvin Clark, Richard E. Mayer. 
 - 3rd ed. 
 - San Francisco, CA :  Pfeiffer,  2008. 
 - xviii, 502 p. :  ill. ;  24 cm. + 
<br/><br/>Includes bibliographical references (p. 405-426) and index. 
<br/><br/><label>ISBN: </label>9780470874301 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business education--Computer-assisted instruction.
<br/><br/><label>Dewey Class. No.: </label>658.32402854678CLA