Ericson Richard V <br/><br/>
Negotiating control :  a study of news sources / 
Richard V. Ericson, Patricia M. Baramek, Janet B.L. Chan. 
 - Toronto :  University of Toronto Press,  1989. 
<br/><br/><label>ISBN: </label>0802026591 0802066917 (pbk) 0335158676 (Open University Press) 0335158668 (v) (pbk) (Open University Press) 
<br/><br/><label>LC Class. No.: </label>PN4781