Research methods in mass communication / 
edited by Guido H. Stemp el, III, Bruce H. Westley. 
 - 2nd ed. 
 - Englewood Cliffs, N.J. :  Prentice Hall,   c1989. 
 - ix, 418 p. :  ill. ;   24 cm. 
<br/><br/>Includes bibliographical references and indexes. 
<br/><br/><label>ISBN: </label>0137739877 
<br/><br/><label>LCCN: </label>88-020005 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communication-- Research-- Methodology.<br/>Mass media-- Research-- Methodology.
<br/><br/><label>Dewey Class. No.: </label>302.2/3