Davison, W. (1982). Mass media systems and effects (2nd.). Holt Rinehurt & Winch.
Lua i Stíl Chicago (17ú heag.)Davison, W. Mass Media Systems and Effects. 2nd. New York: Holt Rinehurt & Winch, 1982.
Lua MLA (9ú heag.)Davison, W. Mass Media Systems and Effects. 2nd. Holt Rinehurt & Winch, 1982.
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