Agee, Warren K. <br/><br/>
Introduction to mass communications / 
Warren K. Agee, Phillip H. Ault, Edwin Emery. 
 - 7th ed. 
 - New York :  Harper & Row,  1982. 
 - 498 p. :  ill. ;  24 cm. 
<br/><br/>Includes index and bibliography : p. 438- 476. 
<br/><br/><label>ISBN: </label>0060401753 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mass media.