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Dyfyniad Arddull ChicagoDicks, Terrance. Doctor Who: The Three Doctors. 1a. ed. Londres: Target Book, 1975.
Dyfyniad MLADicks, Terrance. Doctor Who: The Three Doctors. 1a. ed. Target Book, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.