Schrank, Jeffrey. <br/><br/>
Understanding mass media 
Jeffrey Schrank. 
 - 4th ed. 
 - Lincolnwood, Ill.  NTC Textbook Co.  c1991. 
 - 372 p.  ill. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0844256900 
<br/><br/><label>LCCN: </label>90060407  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mass media<br/>Advertising<br/>Television broadcasting<br/>Radio broadcasting<br/>Newspapers<br/>Motion picture