Siebert, F. S., & Peterson, T. (1956). Four theories of the press. University of Illinois Press.
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Citación estilo Chicago
Siebert, Fred S., and Theodore Peterson. Four Theories of the Press. Urbana: University of Illinois Press, 1956.
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Cita MLA
Siebert, Fred S., and Theodore Peterson. Four Theories of the Press. University of Illinois Press, 1956.
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Warning: These citations may not always be 100% accurate.