TY  - BOOK
AU  - Williams,Kevin
TI  - Understanding Media Theory 
SN  - 978304719046:
AV  - P90 .I485 1990
U1  - 302.23 WIL 20
PY  - 2013///
CY  - London, Britain
PB  - Bloomsbury Academic
KW  - Mass media
N1  - Includes bibliographical references
ER  -