De Fleur, Melvin L. <br/><br/>
Understanding mass communication 
Melvin L. DeFleur, Everette E. Dennis. 
 - 4. ed. 
 - Boston  Houghton Mifflin  c1991. 
 - 637 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mass media<br/>Communication