Dyfyniad APA

SIEBERT, F. S. (1963). Four Theories Of The Press Fred S. Siebert, Theodore Peterson And Wilbur Schramm. University of Illinois Press.

Dyfyniad Arddull Chicago

SIEBERT, Fred S. Four Theories Of The Press Fred S. Siebert, Theodore Peterson And Wilbur Schramm. University of Illinois Press, 1963.

Dyfyniad MLA

SIEBERT, Fred S. Four Theories Of The Press Fred S. Siebert, Theodore Peterson And Wilbur Schramm. University of Illinois Press, 1963.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.