APA (7e ed.) Bronvermelding

Siebert, F. S., Peterson, T., & Schramm, W. (1963). Four theories of the press: The authoritarian, libertarian, social responsibility and soviet communist concepts of what the press should be and do. University of Illinois Press.

Chicago (17e ed.) Bronvermelding

Siebert, Fred S., Theodore Peterson, en Wilbur Schramm. Four Theories of the Press: The Authoritarian, Libertarian, Social Responsibility and Soviet Communist Concepts of What the Press Should Be and Do. Urbana: University of Illinois Press, 1963.

MLA (8e ed.) Bronvermelding

Siebert, Fred S., et al. Four Theories of the Press: The Authoritarian, Libertarian, Social Responsibility and Soviet Communist Concepts of What the Press Should Be and Do. University of Illinois Press, 1963.