Handbook of research on educational communications and technology / 
J. Michael Spector, M. David Merrill, Jan Elen, M. J. Bishop, editors 
 - Fourth Edition 
 - xxxv, 1,005 pages :  illustrations (some color) ;  28 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781461431848 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communication in education--Research--Handbooks, manuals, etc.<br/>Educational technology--Research--Handbooks, manuals, etc.<br/>Instructional systems--Design--Research--Handbooks, manuals, etc.<br/>Telecommunication in education--Research--Handbooks, manuals, etc.