Siebert, F. S., Peterson, T., & Schramm, W. (1956). Four theories of the press / Fred S. Siebert, Theodore Peterson, Wilbur Schramm. University of Illinois Press.
Chicago Edition CitationSiebert, Fredrick Seaton, Theodore Peterson, and Wilbur Schramm. Four Theories of the Press / Fred S. Siebert, Theodore Peterson, Wilbur Schramm. Chicago ; London: University of Illinois Press, 1956.
MLA Edition CitationSiebert, Fredrick Seaton, et al. Four Theories of the Press / Fred S. Siebert, Theodore Peterson, Wilbur Schramm. University of Illinois Press, 1956.
Warning: These citations may not always be 100% accurate.