Gaya APA
Siebert, Fred S. (1974).
Four theories of the press .
London:
University of Illinois.
Gaya Chicago
Siebert, Fred S.
Four theories of the press.
London:
University of Illinois,
1974.
Text.
Gaya MLA
Siebert, Fred S.
Four theories of the press.
London:
University of Illinois,
1974.
Text.
Gaya Turabian
Siebert, Fred S.
Four theories of the press.
London:
University of Illinois,
1974.
Print.