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Dyfyniad Arddull ChicagoChitty, Clyde, and Tony Benn. Eugenics, Race, and Intelligence in Education. London ; New York: Continuum International Pub. Group, 2009.
Dyfyniad MLAChitty, Clyde, and Tony Benn. Eugenics, Race, and Intelligence in Education. Continuum International Pub. Group, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.