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 
 - 2nd ed. 
 - San Francisco, CA  Pfeiffer  c2008 
 - xvi, 476 p.  1 CD-ROM (4 3/4 in.)  24 cm 
<br/><br/> Includes bibliographical references (p. 405-426) and index 
<br/><br/><label>ISBN: </label>9780787986834 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business education--Computer assisted instruction.