Ruckelshaus, W. (1976). Freedom of press. National Press.
Dyfyniad Arddull ChicagoRuckelshaus, William. Freedom of Press. Washington: National Press, 1976.
Dyfyniad MLARuckelshaus, William. Freedom of Press. National Press, 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.