APA (7e ed.) Bronvermelding
Siebert, F. S., & Peterson, T. (1956). Four theories of the press. University of Illinois Press.
Chicago (17e ed.) Bronvermelding
Siebert, Fred S., en Theodore Peterson. Four Theories of the Press. Urbana: University of Illinois Press, 1956.
MLA (9e ed.) Bronvermelding
Siebert, Fred S., en Theodore Peterson. Four Theories of the Press. University of Illinois Press, 1956.
Let op: Deze citaties zijn niet altijd 100% accuraat.