Encyclopaedia Britannica, inc. (1989). The New Encyclopdia Britannica vol. 18: Education evolution (15th ed.). Encyclop�dia Britannica.
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Dyfyniad Arddull Chicago
Encyclopaedia Britannica, inc. The New Encyclopdia Britannica Vol. 18: Education Evolution. 15th ed. Chicago: Encyclop�dia Britannica, 1989.
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Dyfyniad MLA
Encyclopaedia Britannica, inc. The New Encyclopdia Britannica Vol. 18: Education Evolution. 15th ed. Encyclop�dia Britannica, 1989.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.