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Dyfyniad Arddull ChicagoThut, I. N., and Don Adams. Educational Patterns in Contemporary Societies. New York: McGraw-Hill, 1964.
Dyfyniad MLAThut, I. N., and Don Adams. Educational Patterns in Contemporary Societies. McGraw-Hill, 1964.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.