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Dyfyniad Arddull ChicagoPaul, Ellen Frankel, Fred Dycus Miller, and Jeffrey Paul. Freedom of Speech. [Cambridge ; New York: Cambridge University Press, 2004.
Dyfyniad MLAPaul, Ellen Frankel, et al. Freedom of Speech. Cambridge University Press, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.
