Παραπομπή σε μορφή APA (7η εκδ.)

Siebert, F. S. (1956). Four theories of the press: The authoriatarian, libertarian, social responsibility, and Soviet communist concepts of what the press should be and do. University of Illinois Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Siebert, Frederick Seaton. Four Theories of the Press: The Authoriatarian, Libertarian, Social Responsibility, and Soviet Communist Concepts of What the Press Should Be and Do. Urbana: University of Illinois Press, 1956.

Παραπομπή σε μορφή MLA (9th εκδ.)

Siebert, Frederick Seaton. Four Theories of the Press: The Authoriatarian, Libertarian, Social Responsibility, and Soviet Communist Concepts of What the Press Should Be and Do. University of Illinois Press, 1956.