McQuail, Denis, <br/><br/>
Mass communication theory :  an introduction / 
by Denis McQuail. 
 - 245 pages ;  22 cm. 
<br/><br/>References : page 227-238. 
<br/><br/><label>ISBN: </label>080399771x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mass media.