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Dyfyniad Arddull ChicagoRegal, Brian. Pseudoscience: A Critical Encyclopedia. Santa Barbara, California: Greenwood Press, 2009.
Dyfyniad MLARegal, Brian. Pseudoscience: A Critical Encyclopedia. Greenwood Press, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.